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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 A25CEC28CBC for ; Thu, 7 May 2020 00:58:48 +0000 (UTC) Received: from krantz.zx2c4.com (krantz.zx2c4.com [192.95.5.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2EF9A20708 for ; Thu, 7 May 2020 00:58:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2EF9A20708 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pallas.us Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=wireguard-bounces@lists.zx2c4.com Received: by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 5f4db901; Thu, 7 May 2020 00:46:02 +0000 (UTC) Received: from telperion.info (telperion.info [66.160.141.240]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTPS id 8d0ae429 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Thu, 7 May 2020 00:45:58 +0000 (UTC) Received: from [192.168.127.224] (184-23-8-77.dsl.static.fusionbroadband.com [::ffff:184.23.8.77]) (AUTH: LOGIN pallas, ) by telperion.info with ESMTPSA id 0000000000044049.000000005EB35D96.00007480; Wed, 06 May 2020 18:00:06 -0700 Subject: Re: WireGuard over WireGuard To: wireguard@lists.zx2c4.com References: <71c12e22-c7b6-9753-cc44-aac0f51592ff@pallas.us> <9c64d009-4c24-425f-9126-ba93279c208e@www.fastmail.com> From: Derrick Lyndon Pallas Message-ID: Date: Wed, 6 May 2020 17:57:09 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-BeenThere: wireguard@lists.zx2c4.com X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: wireguard-bounces@lists.zx2c4.com Sender: "WireGuard" Note for the list: IPv6 has a minimum of 1280, which means 1360 in the outer layer. ~Derrick On 5/6/20 4:54 PM, Jason A. Donenfeld wrote: > On Wed, May 6, 2020 at 5:28 PM John Lauro wrote: >> Wireguard is defaulting to 1420 MTU, the ethernet adapter is 1500 MTU, >> and I have IPv6 completely disabled. >> >> Can/should the MTU of wireguard be bumped to 1440? > You could if you wanted. But if you don't do it perfectly on all sides > with total uniformity and clearheadedness about your network design, > you'll run into subtle problems.