From owner-freebsd-net@FreeBSD.ORG Fri Jul 13 18:08:46 2007 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 39C7B16A400 for ; Fri, 13 Jul 2007 18:08:46 +0000 (UTC) (envelope-from fox@verio.net) Received: from dfw-smtpout2.email.verio.net (dfw-smtpout2.email.verio.net [129.250.36.42]) by mx1.freebsd.org (Postfix) with ESMTP id 0953613C4BC for ; Fri, 13 Jul 2007 18:08:45 +0000 (UTC) (envelope-from fox@verio.net) Received: from [129.250.36.64] (helo=dfw-mmp4.email.verio.net) by dfw-smtpout2.email.verio.net with esmtp id 1I9PZN-00059W-7N for freebsd-net@freebsd.org; Fri, 13 Jul 2007 18:08:45 +0000 Received: from [129.250.40.241] (helo=limbo.int.dllstx01.us.it.verio.net) by dfw-mmp4.email.verio.net with esmtp id 1I9PZN-00008M-4I for freebsd-net@freebsd.org; Fri, 13 Jul 2007 18:08:45 +0000 Received: by limbo.int.dllstx01.us.it.verio.net (Postfix, from userid 1000) id 86A838E296; Fri, 13 Jul 2007 13:08:41 -0500 (CDT) Date: Fri, 13 Jul 2007 13:08:41 -0500 From: David DeSimone To: freebsd-net@freebsd.org Message-ID: <20070713180840.GB8392@verio.net> Mail-Followup-To: freebsd-net@freebsd.org References: <46967C5C.5040505@seclark.us> <469772DA.1000700@gmail.com> <46977741.8090301@seclark.us> <20070713093408.b8a92c23.wmoran@collaborativefusion.com> <4697A60C.4090409@seclark.us> <20070713130402.ed2f79ce.wmoran@collaborativefusion.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; x-action=pgp-signed Content-Disposition: inline In-Reply-To: <20070713130402.ed2f79ce.wmoran@collaborativefusion.com> Precedence: bulk User-Agent: Mutt/1.5.9i Subject: Re: 6.2 mtu now limits size of incomming packet X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Jul 2007 18:08:46 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Bill Moran wrote: > > Let's flip the question around a bit: why would you _want_ the TCP > stack to accept frames larger than the stated MTU? If I receive a 64K frame and the TCP checksum checks out, and the sequence numbers match, and it passes my firewall state, why NOT receive it? It is obviously valid, even if I cannot understand how my interface could have received it. The packet is here, so do something useful with it. I agree with others that MTU means "limit what I transmit". It does not mean "limit what someone else can transmit to me." - -- David DeSimone == Network Admin == fox@verio.net "It took me fifteen years to discover that I had no talent for writing, but I couldn't give it up because by that time I was too famous. -- Robert Benchley -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFGl7+oFSrKRjX5eCoRAg/IAKCjpErjfEMx33emhDqtNs327Hi1vQCfQnpC i+33Od/k39MaAF/1LZyxj4I= =xtlB -----END PGP SIGNATURE-----