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 Received: from lists.zx2c4.com (lists.zx2c4.com [165.227.139.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ABA33C433F5 for ; Mon, 21 Feb 2022 18:18:47 +0000 (UTC) Received: by lists.zx2c4.com (OpenSMTPD) with ESMTP id 1e1583f5; Mon, 21 Feb 2022 18:17:39 +0000 (UTC) Received: from mail-4319.protonmail.ch (mail-4319.protonmail.ch [185.70.43.19]) by lists.zx2c4.com (OpenSMTPD) with ESMTPS id fc077d21 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO) for ; Sat, 19 Feb 2022 01:23:56 +0000 (UTC) Date: Sat, 19 Feb 2022 01:23:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1645233835; bh=GhXM89dLbFqXGUUsukWW71aiwHeWn46yNmH38m0UmBc=; h=Date:To:From:Reply-To:Subject:Message-ID:From:To:Cc:Date:Subject: Reply-To:Feedback-ID:Message-ID; b=I7QkU9vZhQEy+aRXo0gJb2VfcGGhLIJ4Bu7Mb4JmJeTiyopCe67pjVonE4jGTsCMv fI+NpkwwAQ2fS2N1FD3gnE9CNjU8FbWlrRoua8+BAiEPIg42OUXZdIUFZ1NnGJWjMS zPzqtLdMmEVYW+321fGkjYeV+JZrj0MjkmSlfBZsAZjaCr3oCBodiYZgPefrsIXgUB 0l0qdppbjh4YqiidHzXvVqXtvzXDV6dzL3a4ec2Q0pktgja28oPdCZ0Y/dfH+10KcC arw1lAp79yrQTQcOtgVomd58QYvLJ3b6sFBXddf9JMR3h7KyJ7BuGBnCbxLja7orNn mF1HooPSu2vNg== To: "wireguard@lists.zx2c4.com" From: Rujbin Subject: WireGuard Windows should have default MTU of 1280. Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Mon, 21 Feb 2022 18:17:37 +0000 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: , Reply-To: Rujbin Errors-To: wireguard-bounces@lists.zx2c4.com Sender: "WireGuard" Hello, i am just confused. When i use default MTU the Performance on Windows is VE= RY poor. It is almost unuseable. It happens on multiple Windows devices. I = started using MTU 1280 for a while, but why is it only Windows with that is= sue? First, the speed is limited to 100mbps maximum. Thats weird, when i us= e MTU 1280 i have 1gbps. https://i.imgur.com/ELGOWDQ.png This bug exists for a long time to me. I ran Wireguard on almost every prov= ider, (i didnt check if it happens on Azure) but this bug exists on Hetzner= , DigitalOcean, OVH. This is not normal. I am running the latest stable ver= sion of Wireguard Windows. Kernel module on servers and BoringTun.