From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3FF18C4724C for ; Fri, 1 May 2020 03:23:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2652D2054F for ; Fri, 1 May 2020 03:23:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728148AbgEADXh (ORCPT ); Thu, 30 Apr 2020 23:23:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40902 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728092AbgEADXg (ORCPT ); Thu, 30 Apr 2020 23:23:36 -0400 Received: from shards.monkeyblade.net (shards.monkeyblade.net [IPv6:2620:137:e000::1:9]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71F54C035494 for ; Thu, 30 Apr 2020 20:23:36 -0700 (PDT) Received: from localhost (unknown [IPv6:2601:601:9f00:477::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id A817412772F66; Thu, 30 Apr 2020 20:23:35 -0700 (PDT) Date: Thu, 30 Apr 2020 20:23:34 -0700 (PDT) Message-Id: <20200430.202334.573859461451348083.davem@davemloft.net> To: fgont@si6networks.com Cc: netdev@vger.kernel.org Subject: Re: [PATCH v2 net-next] ipv6: Implement draft-ietf-6man-rfc4941bis From: David Miller In-Reply-To: <20200426154140.GA1065@archlinux-current.localdomain> References: <20200426154140.GA1065@archlinux-current.localdomain> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Thu, 30 Apr 2020 20:23:35 -0700 (PDT) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Fernando Gont Date: Sun, 26 Apr 2020 12:41:40 -0300 > Implement the upcoming rev of RFC4941 (IPv6 temporary addresses): > https://tools.ietf.org/html/draft-ietf-6man-rfc4941bis-09 > > * Reduces the default Valid Lifetime to 2 days > The number of extra addresses employed when Valid Lifetime was > 7 days exacerbated the stress caused on network > elements/devices. Additionally, the motivation for temporary > addresses is indeed privacy and reduced exposure. With a > default Valid Lifetime of 7 days, an address that becomes > revealed by active communication is reachable and exposed for > one whole week. The only use case for a Valid Lifetime of 7 > days could be some application that is expecting to have long > lived connections. But if you want to have a long lived > connections, you shouldn't be using a temporary address in the > first place. Additionally, in the era of mobile devices, general > applications should nevertheless be prepared and robust to > address changes (e.g. nodes swap wifi <-> 4G, etc.) > > * Employs different IIDs for different prefixes > To avoid network activity correlation among addresses configured > for different prefixes > > * Uses a simpler algorithm for IID generation > No need to store "history" anywhere > > Signed-off-by: Fernando Gont Please respin this patch as it no longer applies cleanly. It should be easy, it's just because of the ReST conversion of ip-sysctl.txt Thanks.