From owner-freebsd-net@freebsd.org Mon Apr 5 10:32:29 2021 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 3FE3A5B21D8; Mon, 5 Apr 2021 10:32:29 +0000 (UTC) (envelope-from rozhuk.im@gmail.com) Received: from mail-lj1-x22f.google.com (mail-lj1-x22f.google.com [IPv6:2a00:1450:4864:20::22f]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FDRmr3yn2z3qhp; Mon, 5 Apr 2021 10:32:28 +0000 (UTC) (envelope-from rozhuk.im@gmail.com) Received: by mail-lj1-x22f.google.com with SMTP id z8so12177395ljm.12; Mon, 05 Apr 2021 03:32:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:date:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=S05rCnsd7smj1t3oCFEA8Z1nQiaRoIOxfzYby8BLCq8=; b=eRbHcjIbAg7sVVjp7QYCnLwHqqi0Ndh4t6ko0nG5KhmDoEjLyfDqTqMwFXag2dvq4A JEC4QN9Otv5dzLxRYCszfgyYbzPHLu/dEYOYa19+d1t6HGQOmPHpNObGTqrVicjUvrqy c3obQjzqbOeM29pc2S8cZj1SP+Sv1CMPqfDC8pCGhH4xnaxCQA3nuqMTbOVPFfN9+nHK whR+GitL2HeID2j6kuxTP87P4INPLXqdJe/WAHlsfuqgE+Yp+sMAsNvZeQnilojCl+l/ wyE5X0raO/ohG1zsGzHhWFbkgGaSLvVlVUG8STzBN+b58HUvU6SEqn3whdBskLSly62D 7NNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:date:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=S05rCnsd7smj1t3oCFEA8Z1nQiaRoIOxfzYby8BLCq8=; b=BjjEzhCVQFp15k2Q2a8j9aN+WYfp6YQmExV3VJCoViTgllOHPdNQBdPFeorlAjcy4b yL+NyS1/frjUV53q6hkwQWUD0Xz84AwO3tItlPrlfNfT2HwGPEq2RN7k1we4uQbbfTrl YktSVV88bM5xm96bQPL6ZR52CV35y+G1h7b2ltTHhQ/k+Gd1LfrlTZLWL0M25i6cmSP+ r7h/zcliD43WBP8Ro/qbpmA3VD+U4KfYzgVQS5sumUoM3B0pOlXlACFma/V0ocibHwYz E8SZMh0m9OJ7L53gntlrraeVDxaDc727vbiERugVfr/bfrvg4lrVfldm0xFdOU/nRcqF +m1Q== X-Gm-Message-State: AOAM531aNgk40dzyQrAhTpI1pnIECtrB/EKjgG1n9sQ+4b/zOxAurvM2 G0wzBZ2RbSkMaBY8ebyhEzdA7EgTbD6RIw== X-Google-Smtp-Source: ABdhPJyPBuFa+R0T5V3VVgmqX36pH2HwvOCYfW5GnKpXjz9VUsRumbXgcEMiNRb4tCBhIHrTu5fLzw== X-Received: by 2002:a2e:9b14:: with SMTP id u20mr15624095lji.463.1617618746698; Mon, 05 Apr 2021 03:32:26 -0700 (PDT) Received: from rimwks.local ([2001:470:1f15:3d8:d45f:d9af:2e75:d996]) by smtp.gmail.com with ESMTPSA id y22sm1822093ljg.32.2021.04.05.03.32.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Apr 2021 03:32:26 -0700 (PDT) From: Rozhuk Ivan X-Google-Original-From: Rozhuk Ivan Date: Mon, 5 Apr 2021 13:32:24 +0300 To: Eugene Grosbein Cc: freebsd-current@freebsd.org, freebsd-net Subject: Re: TCP Connection hang - MSS again Message-ID: <20210405133224.469bd865@rimwks.local> In-Reply-To: References: <20210405124450.7505b43c@rimwks.local> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; amd64-portbld-freebsd13.0) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4FDRmr3yn2z3qhp X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=eRbHcjIb; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of rozhukim@gmail.com designates 2a00:1450:4864:20::22f as permitted sender) smtp.mailfrom=rozhukim@gmail.com X-Spamd-Result: default: False [-4.00 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36:c]; FREEMAIL_FROM(0.00)[gmail.com]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[2a00:1450:4864:20::22f:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; TAGGED_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; SPAMHAUS_ZRD(0.00)[2a00:1450:4864:20::22f:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::22f:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-current,freebsd-net] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Apr 2021 10:32:29 -0000 On Mon, 5 Apr 2021 17:23:39 +0700 Eugene Grosbein wrote: > > Is any other other options to work around this? > > Yes. Each entry in the routing table has "mtu" attribute limiting TCP > MSS, too. You should use default route with -mtu 1500 attribute. For > example, in /etc/rc.conf: > > defaultroute="X.X.X.X -mtu 1500" > This help only if I do this on all hosts in network, this is to many management.