Featured resource
Forrester Wave Report 2025
Pluralsight named a Leader in the Forrester Wave™

Our tech skill development platform earned the highest scores possible across 11 criteria.

Learn more
  • Labs icon Lab
  • Security
Google Cloud Platform icon
Labs

Firewall Evasion with Nmap

In this lab, you'll practice firewall evasion techniques using Nmap. When you're finished, you'll have practical experience bypassing simple firewall rules, and an understanding of how different scan techniques can reveal hidden services.

Google Cloud Platform icon
Labs

Path Info

Rating
(13 reviews)
Level
Clock icon Beginner
Duration
Clock icon 45m
Published
Clock icon May 21, 2025

Contact sales

By filling out this form and clicking submit, you acknowledge our privacy policy.

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

    Stealth Scanning Techniques

    To start the lab, you'll learn how to use specialized TCP flag combinations in Nmap to bypass basic firewall rules that block standard TCP connect and SYN scans.

  3. Challenge

    Packet Manipulation Techniques

    You'll explore how modifying packet characteristics can help evade firewall inspection. You'll also experiment with packet fragmentation and source port spoofing to find additional ways to discover services.

  4. Challenge

    The Last Challenge

    Welcome to the final challenge! This is your last chance to experiment in the environment. Clicking Finish Lab will end this little world that flittered into existence just for you.

Angel Sayani is a Certified Artificial Intelligence Expert®, CEO of IntellChromatics, author of two books in cybersecurity and IT certifications, world record holder, and a well-known cybersecurity and digital forensics expert.

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.