Re: [netconf] Latest ietf-netconf-server draft and related modules

Kent Watsen <kent+ietf@watsen.net> Thu, 29 April 2021 18:36 UTC

Return-Path: <010001791eead163-ac714f94-ac4f-455a-adcf-20577ce13dc4-000000@amazonses.watsen.net>
X-Original-To: netconf@ietfa.amsl.com
Delivered-To: netconf@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ECB8D3A1262 for <netconf@ietfa.amsl.com>; Thu, 29 Apr 2021 11:36:21 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.897
X-Spam-Level:
X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HTML_MESSAGE=0.001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=amazonses.com
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 oz8Zqh_496sf for <netconf@ietfa.amsl.com>; Thu, 29 Apr 2021 11:36:17 -0700 (PDT)
Received: from a8-83.smtp-out.amazonses.com (a8-83.smtp-out.amazonses.com [54.240.8.83]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9E8933A1267 for <netconf@ietf.org>; Thu, 29 Apr 2021 11:36:17 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=ug7nbtf4gccmlpwj322ax3p6ow6yfsug; d=amazonses.com; t=1619721376; h=From:Message-Id:Content-Type:Mime-Version:Subject:Date:In-Reply-To:Cc:To:References:Feedback-ID; bh=P2fDjVtOBUQZ65dMMJEPjDe/3lVwKbAGnqtFXA8U8y4=; b=MYQryoQR/KniIF2nWs1t0ZvJeP3y2pSL6kAt77VZHETM6rsk/UbMbDVOwKa2CSki 3UI6EplaUDPRwMs4cRT1484+pi5l0x1leBjXQISMOh6evZT7qYx87pi4jr5/V3IqJiG YrVpIqmzhWqS7YR/GK0mE1nAgIsQ8vKMCTdwRIwA=
From: Kent Watsen <kent+ietf@watsen.net>
Message-ID: <010001791eead163-ac714f94-ac4f-455a-adcf-20577ce13dc4-000000@email.amazonses.com>
Content-Type: multipart/alternative; boundary="Apple-Mail=_9C8EC8D4-1AB1-4F4E-93D5-0F300E710E3D"
Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.60.0.2.21\))
Date: Thu, 29 Apr 2021 18:36:16 +0000
In-Reply-To: <971-608af580-15-2e293dc0@34342692>
Cc: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>, "netconf@ietf.org" <netconf@ietf.org>
To: Michal Vaško <mvasko@cesnet.cz>
References: <971-608af580-15-2e293dc0@34342692>
X-Mailer: Apple Mail (2.3654.60.0.2.21)
Feedback-ID: 1.us-east-1.DKmIRZFhhsBhtmFMNikgwZUWVrODEw9qVcPhqJEI2DA=:AmazonSES
X-SES-Outgoing: 2021.04.29-54.240.8.83
Archived-At: <https://mailarchive.ietf.org/arch/msg/netconf/03Ubf31eIvhMKwjgTfoUM8zqQpc>
Subject: Re: [netconf] Latest ietf-netconf-server draft and related modules
X-BeenThere: netconf@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: NETCONF WG list <netconf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/netconf>, <mailto:netconf-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/netconf/>
List-Post: <mailto:netconf@ietf.org>
List-Help: <mailto:netconf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/netconf>, <mailto:netconf-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 29 Apr 2021 18:36:22 -0000


> On Apr 29, 2021, at 2:05 PM, Michal Vaško <mvasko@cesnet.cz> wrote:
> 
> On Thursday, April 29, 2021 17:14 CEST, Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> wrote:
> 
>> On Thu, Apr 29, 2021 at 05:09:28PM +0200, Juergen Schoenwaelder wrote:
>>> And ssh_config(5) says:
>>> 
>>>   Specifies the order in which the client should try authentication
>>>   methods.  This allows a client to prefer one method (e.g.
>>>   keyboard-interactive) over another method (e.g. password).  The
>>>   default is:
>>> 
>>>             gssapi-with-mic,hostbased,publickey,
>>>             keyboard-interactive,password
>>> 
>>> I have no idea how popular it is to change the default order, which is
>>> likely what most people expect.
>> 
>> Let me add that an implementation that does password before publickey
>> would be somewhat annoying. In other words, I have no opinion whether
>> this order needs to be made configurable but perhaps it is meaningful
>> to spell out a default order that implementors should consider.
> 
> Fair enough, that sounds reasonable and I suppose the default order should cover the majority of use-cases.
> 
> Michal


How about this (the last sentence), in ietf-ssh-client?

        The credentials are unordered.  Clients may initially send
         any configured method or, per RFC 4252, Section 5.2, send
         the 'none' method to prompt the server to provide a list
         of productive methods.  Whenever a choice amongst methods
         arises, implementations SHOULD use a default ordering that
         prioritizes automation over human-interaction.


K.