From owner-freebsd-ipfw@freebsd.org Tue Jan 30 20:48:41 2018 Return-Path: Delivered-To: freebsd-ipfw@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 9931EEE20FA for ; Tue, 30 Jan 2018 20:48:41 +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 TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 3448A80953 for ; Tue, 30 Jan 2018 20:48:41 +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 60C9220E25 for ; Tue, 30 Jan 2018 20:48:40 +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 w0UKmek8088176 for ; Tue, 30 Jan 2018 20:48:40 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w0UKmeDq088175 for freebsd-ipfw@FreeBSD.org; Tue, 30 Jan 2018 20:48:40 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: freebsd-ipfw@FreeBSD.org Subject: [Bug 225536] ipfw tcp-setmss doesn't seems to work Date: Tue, 30 Jan 2018 20:48:40 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: graham@menhennitt.com.au X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-ipfw@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: 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-ipfw@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: IPFW Technical Discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Jan 2018 20:48:41 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D225536 graham@menhennitt.com.au changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |graham@menhennitt.com.au --- Comment #6 from graham@menhennitt.com.au --- (In reply to Emmanuel Vadot from comment #5) Emmanuel, I can't tell you why it matters, but I can say that it does make a signific= ant difference. See my mailing list thread about this from last year at https://lists.freebsd.org/pipermail/freebsd-ipfw/2017-August/006578.html (disabling TSO). Slightly related is another thread https://lists.freebsd.org/pipermail/freebsd-ipfw/2017-September/006585.html (disable TXCSUM). Also, see the ipfw(8) man page in the BUGS section: "Due to the architecture of libalias(3), ipfw nat is not compatible with the TCP segmentation offloading (TSO). Thus, to reliably nat network traffic, please disable TSO on your NICs using ifconfig(8)." Graham --=20 You are receiving this mail because: You are the assignee for the bug.=