Record Network Traffic on Raspberry Pi Using tcpdump

The tcpdump is a command-line tool used for recording the network traffic on the system. It captures the TCP/IP packets transmitted over the network. It is an excellent tool for security purposes since it allows users to save the captured network information in a “pcap” file, which can be opened using the Wireshark utility.

This article will show you how to record network traffic with Raspberry Pi using the tcpdump utility.

Record Network Traffic with Raspberry Pi Using tcpdump

tcpdump is available in the default system repository and you can install it on the Raspberry Pi system using the following “apt” command.

Once the installation is completed, you can start recording the network traffic through the “tcpdump” command. However, only running the “tcpdump” command will start recording many packets. If you want to record network traffic across limited data, you can use the following command:

If you want to record network traffic across a specific network interface, you can use the following command:

Note: Use the “ifconfig” command to find the network interfaces on Raspberry Pi system.

To save the recorded network traffic in the “pcap” file, you can use the following command:

In this way, you can record traffic across the network interface and easily store the information in the “pcap” file.

Remove tcpdump from Raspberry Pi

You can remove tcpdump from Raspberry Pi using the following command:

Conclusion

tcpdump is a command-line utility used for recording the network traffic on the system. To install this tool on the Raspberry Pi system, you can use the “apt” command that directly installs the tool from the Raspberry Pi repository. After the installation, you can use the “tcpdump” command to start recording network traffic across a specific network interface. You can also save the recorded network traffic information in the “pcap” file that you can open using the Wireshark utility later.