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.
These programs were written in the hopes that a more precise and repeatable
testing methodology might be applied to the area of network intrusion
detection, which is still a black art at best.
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