Projects / Tcpreplay


Tcpreplay is a set of Unix tools which allows the editing and replaying of captured network traffic in pcap (tcpdump) format. It can be used to test a variety of passive and inline network devices, including IPS's, UTM's, routers, firewalls, and NIDS.

Operating Systems

Last announcement

New maintainer for Tcpreplay 06 Jan 2014 23:54

As of Dec. 20, 2013, Fred Klassen has accepted the role of maintainer of Tcpreplay. This project will be funded and supported by AppNeta Inc. Many thanks to Aaron Turner for over a dozen years of devotion to this project. Aaron has decided to take on a less active role, but will be continue to offer guidance and support for Fred and his team.

Recent releases

  •  23 Mar 2014 01:48

    Release Notes: This release includes minor bugfixes. It fixes bad values with the --stats and -t options, fixes compilation issues with newer version 10+ netmap libraries, improves error messages, fixes packet counts with the --loop and --cachefile options, and ensures all packets are sent with the --netmap option.

    •  04 Feb 2014 17:20

      Release Notes: This release fixes build issues reported by some users.

      •  18 Jan 2014 00:58

        Release Notes: This release fixes a critical bug which made the --mbps option lead to a hung process.

        •  16 Jan 2014 22:21

          Release Notes: This release includes minor fixes and performance enhancements to the NetFlow features introduced in version 4.0.0. Fixes include support for netmap version 10 API, improvements to netmap performance on Intel GigE "igb" server NICs, and removal of several compiler errors.

          •  07 Jan 2014 00:06

            Release Notes: This release represents major enhancements and bug fixes, including expanded capabilities and increased performance. This is the first version that directly supports IP Flow/Netflow performance testing. It added 10GigE wire-speed replay rates when using netmap network drivers, Netflow, unique flows per iteration, timestamp overhaul, new API, ARM support, and new DLT support.


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