I'm Being Attacked by PRISONER.IANA.ORG! (RFC6305)
Original Publication Date: 2011-Jul-01
Included in the Prior Art Database: 2011-Jul-14
Internet Society Requests For Comment (RFCs)
J. Abley: AUTHOR [+1]
information to allow appropriate measures to be taken in response to it.
Internet Engineering Task Force (IETF) J. Abley Request for Comments: 6305 ICANN Category: Informational W. Maton ISSN: 2070-1721 NRC-CNRC July 2011
I'm Being Attacked by PRISONER.IANA.ORG!
Many sites connected to the Internet make use of IPv4 addresses that are not globally unique. Examples are the addresses designated in RFC 1918 for private use within individual sites.
Hosts should never normally send DNS reverse-mapping queries for those addresses on the public Internet. However, such queries are frequently observed. Authoritative servers are deployed to provide authoritative answers to such queries as part of a loosely coordinated effort known as the AS112 project.
Since queries sent to AS112 servers are usually not intentional, the replies received back from those servers are typically unexpected. Unexpected inbound traffic can trigger alarms on intrusion detection systems and firewalls, and operators of such systems often mistakenly believe that they are being attacked.
This document provides background information and technical advice to those firewall operators.
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/rfc6305.
Abley & Maton Informational [Page 1]
RFC 6305 I'm Being Attacked by PRISONER.IANA.ORG! July 2011
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