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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 D8DB9C54E49 for ; Wed, 6 May 2020 23:55:21 +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 2C0692078C for ; Wed, 6 May 2020 23:55:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="p6/2aws+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C0692078C Authentication-Results: mail.kernel.org; dmarc=pass (p=none dis=none) header.from=zx2c4.com 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 544bf31b; Wed, 6 May 2020 23:42:09 +0000 (UTC) Received: from mail.zx2c4.com (mail.zx2c4.com [192.95.5.64]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTPS id 344ab933 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Wed, 6 May 2020 23:42:07 +0000 (UTC) Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTP id ef23028f for ; Wed, 6 May 2020 23:42:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=zx2c4.com; h=mime-version :references:in-reply-to:from:date:message-id:subject:to:cc :content-type; s=mail; bh=D/usW8grq1MrPqcLErnIvyCjXQc=; b=p6/2aw s+oXJ9MKC7oXGC1PYd/Dx0zpSmjM6H62u7NjbTQvhT/RfDtsyd02doCnvQZC4ZRt wQzilwg4ixYyJCqf999GBJn6YNZhEA47nzKf6ryNjbryK94tkIlsny16jsw8ygJB /reJ4rXBKbPqlrysi12tsdlBY6k7BeJdDKk9XhxOWVTMJb4UAmexns0kAKIXUHdQ 1YqABUbx0ip5bD2beLIjdGJ8ldg8wG6Sz7LcKUQLQv6oVHnkFaDWvC2TMXUu1Avj Ysb4mX6wOa22ElWAbeXGIPev9Dn+Ilo4EVfyRkrycdBf2Exah/Ab0DchucPfZo7m t9nHRw5Q03zTGwTg== Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id b876d978 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Wed, 6 May 2020 23:42:07 +0000 (UTC) Received: by mail-io1-f54.google.com with SMTP id u11so4260822iow.4 for ; Wed, 06 May 2020 16:54:51 -0700 (PDT) X-Gm-Message-State: AGi0PuZVgo2WysJHOIOodCGAt8qcwRtlB7BbSWFD6EYtYZn8e2Pzk09t PpDlKWOhZhy/wWi4HAGy7wfNGQOdzEgeD2eCgWs= X-Google-Smtp-Source: APiQypIrHau4vDYPkMtxGIARRQRZt7+gK2Al5MPAwTteLhIrg0M4FVTrQEE5q6OaAcV7AOuKjXy/GiObtOkH9MyUMA4= X-Received: by 2002:a05:6602:21d3:: with SMTP id c19mr10904745ioc.29.1588809290827; Wed, 06 May 2020 16:54:50 -0700 (PDT) MIME-Version: 1.0 References: <71c12e22-c7b6-9753-cc44-aac0f51592ff@pallas.us> <9c64d009-4c24-425f-9126-ba93279c208e@www.fastmail.com> In-Reply-To: From: "Jason A. Donenfeld" Date: Wed, 6 May 2020 17:54:39 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: WireGuard over WireGuard To: John Lauro Cc: Justin Kilpatrick , WireGuard mailing list Content-Type: text/plain; charset="UTF-8" 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" 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.