wireshark tutorial how to sniff ip address network traffic

Rewrite any destination IP address and MAC address in dump.pcap to 192.168.1.20 and E0:DB:55:CC:13:F1, respectivelyi, and store the result to temp1.pcap: $ tcprewrite -infile=dump.pcap -outfile=temp1.pcap -dstipmap=0.0.0.0/0:192.168.1.20 -enet-dmac=E0:DB:55:CC:13:F1Ģ.

Replace IP/MAC addresses with your own.ġ. You can use the following set of commands to perform such packet rewriting. The reason why rewriting step is necessary is because source/destination IP/MAC addresses in the original pcap file may be mismatched with those in the environment where you want to replay the pcap file. Next, rewrite packets captured in a pcap file. I assume that eth0 is the sniffing interface which is set to promiscuous mode. To do so, run tcpdump command as follows. The next step is to capture live network traffic, and dump it to a pcap file. To install tcpreplay, follow the instructions in this tutorial. Capture Live Network Trafficįirst, install tcpreplay and tcpdump on your Linux system.

In this tutorial, I will show you how to capture live network traffic and replay the captured network traffic elsewhere with tcpreplay. In Linux, there is a suites of command-line utilities called tcpreplay which can replay captured network traffic.

Using repeatable traffic minimizes any kind of uncertainty in the testing environment, thereby making testing results easier to interpret and analyze. When you are testing or debugging middlebox hardware such as routers, switches, or intrusion detection systems ( Snort or Suricata), it is extremely useful to perform the testing with reproducible network traffic. How to capture and replay network traffic on Linux

Wireshark tutorial how to sniff ip address network traffic