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Labs

Analyzing and Decrypting TLS with Wireshark

In this lab, you’ll practice capturing network traffic, decrypting, and analyzing it to verify proper TLS operation. When you’re finished, you’ll know how to capture session keys and use them to decrypt traffic in Wireshark.

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Labs

Path Info

Rating
(23 reviews)
Level
Clock icon Beginner
Duration
Clock icon 1h 0m
Published
Clock icon Oct 06, 2024

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Table of Contents

  1. Challenge

    Getting Started in the Lab Environment

    Here are the initial instructions and explanation of the lab environment. Read this while your environment is busy creating itself from nothing. Yes, this violates physics; we know. How fun!

  2. Challenge

    Capture an HTTPS Website and Session Keys in Wireshark Using Windows

    In this challenge ,you will be provided with a virtualized Windows desktop where you will configure it to capture session keys for all TLS sessions using the Firefox browser.

  3. Challenge

    Filter the Captured Frames and Decrypt the Capture with the Session Keys

    In this challenge, you will use information collected from the previous Challenge to filter out only the frames associated with the Globomantics website, and then apply the session keys to decrypt the messages.

  4. Challenge

    Examine the Decrypted TLS Handshake

    In this challenge, you will take a deeper look at the TLS handshake. The handshake has many detailed components, and you will examine the Client Hello, Server Hello, and Certificate messages. There is an option to use an external website to examine more details of the handshake if you like.

  5. Challenge

    Capture an HTTPS Website and Session Keys in Wireshark Using Linux Desktop, and decrypt the messages

    In this challenge, you will repeat the exercise of capturing an HTTPS website and the session keys, but this time in Linux. You will find the TCP session for the website, and then decrypt it with the session keys.

  6. Challenge

    Examine the HTTPS Session of a TLS 1.1 Server

    In this last challenge, you will use Wireshark to capture a website and examine what happens when the browser does not support the version of TLS configured on the server.

For nearly 20 years, Ross has taught and managed data networks.

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Provided environment for hands-on practice

We will provide the credentials and environment necessary for you to practice right within your browser.

Guided walkthrough

Follow along with the author’s guided walkthrough and build something new in your provided environment!

Did you know?

On average, you retain 75% more of your learning if you get time for practice.