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Getting Started: Tshark

tshark-basics | Level: Easy  | Total Lab Runs: 0 | Premium Lab

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Lab Walkthrough Video:

Tshark is a command line tool created by the Wireshark team and shares the same powerful parsing engine as Wireshark. It is capable of doing most things we've come to love Wireshark for, but with the "from command line" advantage. This makes it ideal for batch analysis, offline processing and routine automation of traffic analysis tasks. In this course, we will explore many of these capabilities. It is assumed you have a basic working knowledge of Wireshark and traffic analysis. We have created a detailed course on Wireshark on Pentester Academy.  In this series of labs, we will teach you how to use Tshark effectively! So, let's get started!


Set A:

  1. Which version of Tshark is installed in the lab?
  2. Find all Tshark supported network interfaces for monitoring
  3. What is the Tshark command to sniff on eth0? Why did this command fail? 

Set B:

  1. Tshark supports PCAP files. The lab environment has a sample file: HTTP_traffic.pcap. How can you read this file in Tshark and display the packet list on the console? 
  2. How can you find the total number of packets in HTTP_traffic.pcap?
  3. Tshark command to read the first 100 packets only from HTTP_traffic.pcap? 
  4. Print the list of protocols in HTTP_traffic.pcap  

This is an easy lab but here are some hints :) 

Set A:

  • Most command line tools list all valid options when run without arguments or with predictable flags such as -h
  • Once you discover the options, listing all support interfaces should be easy
  • Why can't you sniff eth0? Should any user on a Linux system be allowed to monitor network traffic? 

Set B:

  • Reading files should be easy once you figure out how to list all available options for Tshark
  • Listing number of packets can be done in multiple ways including piping Tshark's output to other common Linux command line tools
  • Locate the packet count option
  • There is an option to list all protocols and corresponding protocol count under the statistics option

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