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Performing a Packet Capture

In this learning activity, you will need to perform a packet capture of web requests from `Client1` ( to `Server1` ( and the requisite responses. The resulting file should only contain this data.

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Path Info

Clock icon Intermediate
Clock icon 1h 0m
Clock icon Nov 14, 2018

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Table of Contents

  1. Challenge

    Install tcpdump

    You will need to install tcpdump:

    # yum install tcpdump

  2. Challenge

    Begin the Packet Capture

    You will want to apply a capture filter so that you're only getting web requests:

    # tcpdump port 80 -w capture.pcap

  3. Challenge

    Generate Some Traffic

    Since this isn't a public web server, you will need to generate some traffic from Client1 ( to Server1 ( This needs to be done while the tcpdump capture is running.

  4. Challenge

    Cancel the Capture and View the File

    After you've generated some requests, you can cancel the running capture and view the file:

    tcpdump -r capture.pcap

    Move the file to /root/ if it's not there already.

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