tcpreplay
Replay captured packets onto a network.
KaliParrotLinuxmedium
pkg: tcpreplay
tcpreplay re-sends pcap traffic at chosen speeds — for testing IDS/IPS, firewalls and network tooling.
Syntax
tcpreplay -i {iface} {cap.pcap}
Example
tcpreplay -i eth0 -t cap.pcap
Replays a capture at top speed onto eth0.
Advantages
- Reproduce traffic for testing
- Speed control
Disadvantages
- Can disrupt live networks
- Lab use recommended
Tags
#pcap#testing
Official docs: tcpreplay ↗
Related commands
Frequently asked questions
What is tcpreplay used for?
tcpreplay re-sends pcap traffic at chosen speeds — for testing IDS/IPS, firewalls and network tooling.
What is an example tcpreplay command?
A common example is: tcpreplay -i eth0 -t cap.pcap — Replays a capture at top speed onto eth0.
Is tcpreplay part of Kali Linux?
Yes. tcpreplay ships with Kali Linux (and Parrot OS). If missing, install it with: sudo apt install tcpreplay.
What category of security tool is tcpreplay?
tcpreplay is a Sniffing & Spoofing tool with a medium-risk profile when run against a live target.
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