Someone has this problem so they decided to code their own solution, thankfully for us! There are quite a few tools to do this for *nix based systems but none for Windows, so here we go, a traffic replay tool for the Windows platform!

PReplay is a utility to replay captured data over the network, its main feature is that it will record the time difference between two packets (not very accurately but it works for micro/millisecond difference) it reads the capture file and then determines the time difference for the next packet.

You can give list of capture file which you want to send in the Preplay.ini in the [SendingFileName] section as below:

1=IPDump.cap
2=IPDump2.cap

Semicolon (;) is used for commenting a line you don’t want the program to read, so you can
comment out the file name which you don’t want to send like this:

[SendingFileName]
1=IPDump.cap
;2=IPDump2.cap

It will not send 2nd file.

SendingFilePath, here you can specify the directory which contains the captured files.

You can download the tool here:

PReplay

This is version 1.1 which has a few fixes such as the ability to change the MAC and IP address of the gateway and client machine.

Another good tool updated! TCPReplay suite 3.0.beta10 has been released.

For those that don’t know Tcpreplay is a suite of BSD licensed tools written by Aaron Turner for *NIX operating systems which gives you the ability to use previously captured traffic in libpcap format to test a variety of network devices. It allows you to classify traffic as client or server, rewrite Layer 2, 3 and 4 headers and finally replay the traffic back onto the network and through other devices such as switches, routers, firewalls, NIDS and IPS’s. Tcpreplay supports both single and dual NIC modes for testing both sniffing and inline devices.

Tcpreplay is used by numerous firewall, IDS, IPS and other networking vendors, enterprises, universities, labs and open source projects.

Beta10 contains a number of major enhancements as the code continues to stabilize for the 3.0 stable release. The big changes include removing Libnet as a requirement, tcpprep and tcprewrite no longer requiring root access and improved packet timings for tcpreplay. There are also a number of smaller enhancements and bug fixes.

Also a lot of time has been spent updating the online manual on the wiki which covers most if not all the features of tcpreplay, tcpprep and tcprewrite.

This should be the final beta release and it’s expected to have the first release candidate in a month or so. Please download and test!

You can download it here:

TCPReplay

The new Wikified manual is here.

Download: http://prdownloads.sourceforge.net/tcpreplay/tcpreplay-3.0.beta10.tar.gz?download