Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 15 Mar 2002 18:19:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 15 Mar 2002 18:19:35 -0500 Received: from pizda.ninka.net ([216.101.162.242]:38817 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Fri, 15 Mar 2002 18:19:26 -0500 Date: Fri, 15 Mar 2002 15:16:28 -0800 (PST) Message-Id: <20020315.151628.122227750.davem@redhat.com> To: davids@webmaster.com Cc: alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org Subject: Re: RFC2385 (MD5 signature in TCP packets) support From: "David S. Miller" In-Reply-To: <20020315231400.AAA28257@shell.webmaster.com@whenever> In-Reply-To: <20020315231400.AAA28257@shell.webmaster.com@whenever> X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: David Schwartz Date: Fri, 15 Mar 2002 15:13:59 -0800 There is no problem with MD5 that makes it unsuitable for this particular application. A SHA signature would enlarge each packet, further reducing the effective MTU. This would increase the cost of what was intended to be a simple mechanism to solve a specific problem (spoofed SYNs/RSTs). Ignoring valid RST frames breaks TCP. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/