Can you inject packets with tcpreplay?
When tcpreplay sends packets, it injects them between the TCP/IP stack of the system and the device driver of the network card. The result is the TCP/IP stack system running tcpreplay never sees the packets. One suggestion that has been made is using something like VMWare, Parallels or Xen.
How does tcpreplay work?
It allows you to classify traffic as client or server, rewrite Layer 2, 3 and 4 packets 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 in-line devices.
How do I read a pcap file using tcpdump?
All you have to do is use the “-r” option with tcpdump command and specify the path of the file you want to read.
What is pcap playback?
Tcpreplay is a suite of free Open Source utilities for editing and replaying previously captured network traffic. Originally designed to replay malicious traffic patterns to Intrusion Detection/Prevention Systems, it has seen many evolutions including capabilities to replay to web servers. Version 4.0.
How do I replay TCP Traffic?
How to record and replay TCP traffic
- Record TCP traffic with tcpdump to pcap file.
- View captured traffic tcpdump -qns 0 -X -r app-traffic.pcap.
- Edit source IP so that it’s on your own network.
- Replay traffic with tcplivereplay from recorded pcap file (note step #3)
How do I view pcap files?
Procedure
- Select the event and click the PCAP icon.
- Right-click the PCAP icon for the event and select More Options > View PCAP Information.
- Double-click the event that you want to investigate, and then select PCAP Data > View PCAP Information from the event details toolbar.
What is Tcpreplay?
Tcpreplay is a suite of free Open Source utilities for editing and replaying previously captured network traffic. Originally designed to replay malicious traffic patterns to Intrusion Detection/Prevention Systems, it has seen many evolutions including capabilities to replay to web servers.
How do I replay pcap with Tcpreplay?
tcpreplay —> send packets : takes a pcap file and replays it as is….Control and replay network traffic with tcpreplay.
| # tcpreplay -i eth0 sample.pcap | replay a given pcap as it was captured |
|---|---|
| #tcpreplay –loop=10 -i eth0 sample.pcap | To replay the sample.pcap file 10 times |
| #tcpreplay –loop=0 -i eth0 sample.pcap | To replay the sample.pcap forever or until CTRL-C is pressed |
How does libpcap work?
Essentially, the libpcap library grabs packets directly from the network cards, which allowed developers to write programs to decode, display, or log the packets.
How do I replay a PCAP file?
To replay your own packet capture data, simply add any number of files containing libpcap formatted packet capture data to /opt/pcap-replay. The files must end with the . pcap extension. To pick up newly installed files, simply restart the service.