DownloadSupported systems: Linux, BSD, macOS, and Windows.
Bit-Twist is a simple yet powerful libpcap-based Ethernet packet generator and packet editor. It is designed to complement tcpdump, which by itself has done a great job at capturing network traffic.
With Bit-Twist, you can now regenerate your captured traffic onto a live network! Packets are generated from tcpdump trace file (.pcap file). Bit-Twist also comes with a comprehensive trace file editor to allow you to change the contents of a trace file.
Bit-Twist is designed for exceptional speed! Utilizing a standard laptop with Linux system, you can edit 10 million packets in less than 5 seconds, and send the packets onto a live network, achieving throughput levels that match the maximum line rate of your NIC.
Packet generator is useful in simulating networking traffic or scenario, testing firewall, IDS, and IPS, and troubleshooting various network problems.
https://bittwist.sourceforge.io / ayeowch@gmail.com
Features
- Highly portable: Bit-Twist runs on Linux, BSD, macOS, and Windows.
- Send multiple trace files indefinitely with set interval, packets per second, or line rate between 1 Mbps to 10 Gbps using built-in token bucket algorithm.
- Comprehensive trace file editor to edit most fields in Ethernet, ARP, IPv4, IPv6, ICMPv4, ICMPv6, TCP, and UDP headers. Templates are also included to generate packets with these headers without needing an existing trace file.
- Automatic header checksum correction (with option to disable).
- Send packets with custom QoS bits to test classification and queuing features of switches and routers.
- Send packets with uniformly distributed random numbers for port numbers, TCP sequence numbers, etc.
- Append custom payload (e.g. copy of hex stream from Wireshark) to existing packets after a specific header, handy for testing new protocols.
- Send packets with truncated or expanded length in bytes, facilitating incremental throughput testing.
- Highly scriptable: With proper manipulation, you can turn Bit-Twist into a versatile packet generator and packet editor tooling to meet your network testing requirements.
Project Samples
Categories
NetworkingLicense
GNU General Public License version 2.0 (GPLv2)Follow Bit-Twist (Packet Generator/Editor)
User Reviews
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Finally a packet replay and editing tool that simply works on all major platforms and command line (can be used in scripts, ..) Perfect for testing during development and validation phase. I was looking for a packet replay tool, continuous looping multicast data feeds for debugging and testing radar data feed quality monitoring tools. Great work guys !
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Bittwist is great for crafting custom packets to test the Next Generation Firewalls my company is busy devleping. Thanks for the hard work.