From owner-freebsd-net@FreeBSD.ORG Fri Aug 1 08:26:40 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 767F737B401 for ; Fri, 1 Aug 2003 08:26:40 -0700 (PDT) Received: from hysteria.spc.org (hysteria.spc.org [195.206.69.234]) by mx1.FreeBSD.org (Postfix) with SMTP id 4FBAC43FE1 for ; Fri, 1 Aug 2003 08:26:39 -0700 (PDT) (envelope-from bms@hysteria.spc.org) Received: (qmail 30849 invoked by uid 5013); 1 Aug 2003 15:24:08 -0000 Date: Fri, 1 Aug 2003 16:24:08 +0100 From: Bruce M Simpson To: michael rabinovich Message-ID: <20030801152408.GF27921@spc.org> Mail-Followup-To: Bruce M Simpson , michael rabinovich , freebsd-net@freebsd.org References: <200308011514.LAA46005@chips.research.att.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200308011514.LAA46005@chips.research.att.com> User-Agent: Mutt/1.4.1i Organization: SPC cc: freebsd-net@freebsd.org Subject: Re: T/TCP useless on FreeBSD 4.7? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Aug 2003 15:26:40 -0000 On Fri, Aug 01, 2003 at 11:14:12AM -0400, michael rabinovich wrote: > Does anyone know the status of T/TCP support on FreeBSD 4.7? ... > Am I missing something (after all, FreeBSD is supposed to be a ref > implementation of T/TCP!) and if not is there is a simple way around > this problem, short of going back to earlier FreeBSD releases? I don't use T/TCP on my production 4.8-RELEASE system, and the following sysctl values look fairly default:- net.inet.tcp.rfc1644: 0 net.inet.tcp.syncookies: 1 net.inet.tcp.drop_synfin: 0 SYN cookies and T/TCP can't co-exist. Please do check the above sysctl values; I know RFC 1644 has to be enabled, and syncookies have to be disabled, as well as drop_synfin. HTH, BMS