From owner-freebsd-bugs@freebsd.org Wed Jan 30 21:35:47 2019 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 10394131A0A6 for ; Wed, 30 Jan 2019 21:35:47 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 986408701D for ; Wed, 30 Jan 2019 21:35:46 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 5B826131A0A5; Wed, 30 Jan 2019 21:35:46 +0000 (UTC) Delivered-To: bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 49CF0131A0A4 for ; Wed, 30 Jan 2019 21:35:46 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id DE0718701C for ; Wed, 30 Jan 2019 21:35:45 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 2A95545C8 for ; Wed, 30 Jan 2019 21:35:45 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x0ULZj2s027271 for ; Wed, 30 Jan 2019 21:35:45 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x0ULZjbE027270 for bugs@FreeBSD.org; Wed, 30 Jan 2019 21:35:45 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 235333] SSH data transmission speed unnecessarily slow due to IPQoS default setting Date: Wed, 30 Jan 2019 21:35:44 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: conf X-Bugzilla-Version: 12.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: tony@accesslab.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Jan 2019 21:35:47 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235333 Bug ID: 235333 Summary: SSH data transmission speed unnecessarily slow due to IPQoS default setting Product: Base System Version: 12.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Many People Priority: --- Component: conf Assignee: bugs@FreeBSD.org Reporter: tony@accesslab.com On certain connections, for example through some wireless devices, FreeBSD ssh/scp will copy data very slowly. Typically I see copy rates at 1/3 normal speed. This is happening because the IPQoS option for both ssh/scp (ssh_con= fig) and sshd (sshd_config) default the IPQoS setting to 'af21'. Changing this setting to instead default to 'lowdelay' will produce normal data transmiss= ion speeds out-of-the-box for new FreeBSD installs thus making many users happi= er not having to trouble shoot and track down this weird random problem when it occurs. The low speed transmission issue only occurs on some connection pat= hs, mostly I have seen it happen when copying data through a wireless bridge or access point. In hind sight, I see that on Linux, Openssh DOES default IPQo= S =3D lowdelay, and perhaps that is not by accident? --=20 You are receiving this mail because: You are the assignee for the bug.=