From owner-freebsd-net@FreeBSD.ORG Sun Apr 16 15:02:06 2006 Return-Path: X-Original-To: freebsd-net@freebsd.org 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 C134F16A401 for ; Sun, 16 Apr 2006 15:02:06 +0000 (UTC) (envelope-from det_re@yahoo.com) Received: from web60113.mail.yahoo.com (web60113.mail.yahoo.com [209.73.178.96]) by mx1.FreeBSD.org (Postfix) with SMTP id D498E43D46 for ; Sun, 16 Apr 2006 15:02:05 +0000 (GMT) (envelope-from det_re@yahoo.com) Received: (qmail 58744 invoked by uid 60001); 16 Apr 2006 15:02:05 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=6DWa/K8/J1yHaUG7c1y/wVJWWO1y3TpFkSEt22P5WzFxayHn0x9r07HuS4O4ZWt/n8VzHTk7lvLbNffvQygnvLLT0nhkhhgTFHLQaiOQvVvfM8T1487qhFFrFaCcj/VcZuI0qg4E8wJZYBUICjvhID+9JATOz2jwAA/eNhUP8hk= ; Message-ID: <20060416150205.58742.qmail@web60113.mail.yahoo.com> Received: from [60.48.72.166] by web60113.mail.yahoo.com via HTTP; Sun, 16 Apr 2006 08:02:04 PDT Date: Sun, 16 Apr 2006 08:02:04 -0700 (PDT) From: "Yeow C.H." To: freebsd-net@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Libpcap based: packet generator + capture file editor + bridge for IEEE802.3 on FreeBSD X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 Apr 2006 15:02:06 -0000 For those who are interested with this libpcap based networking suite, please do check out Bit-Twist 0.7, development release here: 1. http://bittwist.sourceforge.net/ (Bit-Twist homepage) 2. http://sourceforge.net/projects/bittwist/ (SF.net project page) Bit-Twist is a simple and powerful libpcap-based Ethernet II (IEEE 802.3) packet generator that comes complete with a comprehensive pcap capture file editor and a multiport link speed capability Ethernet bridge! It is designed to compliment tcpdump, which by itself has done a great job in capturing network traffic. With Bit-Twist, you can now regenerate the captured traffic onto a live network. Packets are generated from saved tcpdump capture file (trace file). Bit-Twist also comes with a comprehensive trace file editor to allow you to change the contents of a trace file. You can also append your own payload to each packet in the trace file (IP/TCP/UDP/ICMP header checksum is corrected automatically). Although packet generator is generally useful for simulating networking traffic, testing firewall/IDS/IPS, or troubleshooting various network problems, Bit-Twist (together with tcpdump) has also proven itself to be useful for educational purposes especially in Computer Network classes. As with most of the existing packet generators, this is not immediately trivial (e.g. many times, they are complex, huge, and overloaded with features). Bit-Twist prevails here with its simplicity in its implementation, usage, and deployment which helps cut the learning curve of students' and general users alike. Currently, Bit-Twist compiles on *BSD and Linux and it works under Ethernet II (802.3) network with a MTU of up to 1500 bytes on 10Mbps (10Base-T Ethernet) or 100Mbps (Fast Ethernet) link speed. --------------------------------- New Yahoo! Messenger with Voice. Call regular phones from your PC and save big.