The Tcpreplay suite includes the following tools: tcpprep - multi-pass pcap file pre-processor which determines packets as client or server and creates cache files used by tcpreplay and tcprewrite tcprewrite - pcap file editor which rewrites TCP/IP and Layer 2 packet headers tcpreplay - replays pcap files at arbitrary speeds onto the network tcpbridge - bridge two network segments with the power of tcprewrite flowreplay - emulates a network client using a pcap file as the basis of a TCP or UDP connection (currently in alpha)