[rfc-dist] RFC 9109 on Network Time Protocol Version 4: Port Randomization
rfc-editor@rfc-editor.org Tue, 24 August 2021 04:29 UTC
Return-Path: <rfc-dist-bounces@rfc-editor.org>
X-Original-To: ietfarch-rfc-dist-archive@ietfa.amsl.com
Delivered-To: ietfarch-rfc-dist-archive@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 79BCD3A083F for <ietfarch-rfc-dist-archive@ietfa.amsl.com>; Mon, 23 Aug 2021 21:29:38 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.901
X-Spam-Level:
X-Spam-Status: No, score=-2.901 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, MAILING_LIST_MULTI=-1, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mOdgZzdHoVWX for <ietfarch-rfc-dist-archive@ietfa.amsl.com>; Mon, 23 Aug 2021 21:29:34 -0700 (PDT)
Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3B6933A0879 for <rfc-dist-archive-yuw6Xa6hiena@ietf.org>; Mon, 23 Aug 2021 21:29:28 -0700 (PDT)
Received: from rfcpa.amsl.com (localhost [IPv6:::1]) by rfc-editor.org (Postfix) with ESMTP id 923E1F40782; Mon, 23 Aug 2021 21:29:14 -0700 (PDT)
X-Original-To: rfc-dist@rfc-editor.org
Delivered-To: rfc-dist@rfc-editor.org
Received: by rfc-editor.org (Postfix, from userid 30) id 10BE2F40780; Mon, 23 Aug 2021 21:29:14 -0700 (PDT)
To: ietf-announce@ietf.org, rfc-dist@rfc-editor.org
X-PHP-Originating-Script: 1005:ams_util_lib.php
From: rfc-editor@rfc-editor.org
Message-Id: <20210824042914.10BE2F40780@rfc-editor.org>
Date: Mon, 23 Aug 2021 21:29:14 -0700
Subject: [rfc-dist] RFC 9109 on Network Time Protocol Version 4: Port Randomization
X-BeenThere: rfc-dist@rfc-editor.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: RFC Announcements <rfc-dist.rfc-editor.org>
List-Unsubscribe: <https://www.rfc-editor.org/mailman/options/rfc-dist>, <mailto:rfc-dist-request@rfc-editor.org?subject=unsubscribe>
List-Archive: <http://www.rfc-editor.org/pipermail/rfc-dist/>
List-Post: <mailto:rfc-dist@rfc-editor.org>
List-Help: <mailto:rfc-dist-request@rfc-editor.org?subject=help>
List-Subscribe: <https://www.rfc-editor.org/mailman/listinfo/rfc-dist>, <mailto:rfc-dist-request@rfc-editor.org?subject=subscribe>
Cc: drafts-update-ref@iana.org, ntp@ietf.org, rfc-editor@rfc-editor.org
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: rfc-dist-bounces@rfc-editor.org
Sender: rfc-dist <rfc-dist-bounces@rfc-editor.org>
A new Request for Comments is now available in online RFC libraries.
RFC 9109
Title: Network Time Protocol Version 4:
Port Randomization
Author: F. Gont,
G. Gont,
M. Lichvar
Status: Standards Track
Stream: IETF
Date: August 2021
Mailbox: fgont@si6networks.com,
ggont@si6networks.com,
mlichvar@redhat.com
Pages: 9
Updates: RFC 5905
I-D Tag: draft-ietf-ntp-port-randomization-08.txt
URL: https://www.rfc-editor.org/info/rfc9109
DOI: 10.17487/RFC9109
The Network Time Protocol (NTP) can operate in several modes. Some
of these modes are based on the receipt of unsolicited packets and
therefore require the use of a well-known port as the local port.
However, in the case of NTP modes where the use of a well-known port
is not required, employing such a well-known port unnecessarily
facilitates the ability of attackers to perform blind/off-path
attacks. This document formally updates RFC 5905, recommending the
use of transport-protocol ephemeral port randomization for those
modes where use of the NTP well-known port is not required.
This document is a product of the Network Time Protocol Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
memo is unlimited.
This announcement is sent to the IETF-Announce and rfc-dist lists.
To subscribe or unsubscribe, see
https://www.ietf.org/mailman/listinfo/ietf-announce
https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist
For searching the RFC series, see https://www.rfc-editor.org/search
For downloading RFCs, see https://www.rfc-editor.org/retrieve/bulk
Requests for special distribution should be addressed to either the
author of the RFC in question, or to rfc-editor@rfc-editor.org. Unless
specifically noted otherwise on the RFC itself, all RFCs are for
unlimited distribution.
The RFC Editor Team
Association Management Solutions, LLC
_______________________________________________
rfc-dist mailing list
rfc-dist@rfc-editor.org
https://www.rfc-editor.org/mailman/listinfo/rfc-dist
http://www.rfc-editor.org