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=-5.8 required=3.0 tests=BAYES_00,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 7ECB6C433ED for ; Fri, 30 Apr 2021 13:56:09 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A978061185 for ; Fri, 30 Apr 2021 13:56:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A978061185 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 lists.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 69eaea99; Fri, 30 Apr 2021 13:49:35 +0000 (UTC) Received: from mail.zx2c4.com (mail.zx2c4.com [104.131.123.232]) by lists.zx2c4.com (ZX2C4 Mail Server) with ESMTPS id fa555b78 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO) for ; Fri, 30 Apr 2021 13:49:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1619790570; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=3RAq0qFs9cOTiuxCOTsuJkwMhluyTv1RJ6q4Cz7uZpA=; b=CkodrYkgzeNm49SfEKty+kE2y6Jc9JtoeJIFmNSeFAzQo9nVX/97DgSNZDbpsFqtNbmt75 vST9PVewL7Tnq/3K0uCtQmA+iUsqHvKF0TmNSfOz04QGZ82Ti39ifiJX4LlOKmlxJ/YUyI YnfOqhHRLVi30S1FkBDknhXMmfghkiw= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 17895c16 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO) for ; Fri, 30 Apr 2021 13:49:30 +0000 (UTC) Received: by mail-yb1-f174.google.com with SMTP id g38so83186477ybi.12 for ; Fri, 30 Apr 2021 06:49:30 -0700 (PDT) X-Gm-Message-State: AOAM531uuAfQ0fjXPwnutfpbAgMt6FiR+GVXWEpftoBFipxApgUBlUOx 1iGse3Tcdw1Q5wjwljQxsiRFK/1k6AG7s8ZLh0k= X-Google-Smtp-Source: ABdhPJwb0yHRhgIh3ezhWQBgF+jmm/6+fMyUC2AAJ2G+fWdbiFFjRoFz7b0RmFAjvs+lxenp4K4grNYQOJ+v+3aBYFk= X-Received: by 2002:a05:6902:501:: with SMTP id x1mr6995913ybs.456.1619790569709; Fri, 30 Apr 2021 06:49:29 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: "Jason A. Donenfeld" Date: Fri, 30 Apr 2021 15:49:18 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: Intermittent handshake failures in WireGuard for Windows To: Joshua Sjoding Cc: 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" Hi Joshua, Is it possible that something nasty is happening with UDP NAT/Conntracking tables on whatever intermediate device? It might help to take some TCP dumps along the way and see where the packets are going and whether they're lost past a certain hop. Jason