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Ross Bagurdes

This course will demystify the operation of a firewall by explaining its purpose and how it operates. You'll learn concepts like network trust levels, TCP, access control lists, network address translation, and application inspection.

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This course will demystify the operation of a firewall by explaining its purpose and how it operates. You'll learn concepts like network trust levels, TCP, access control lists, network address translation, and application inspection.

Firewalls are one of the oldest and most important security appliances in a network. In this course, Introduction to Firewalls, you’ll learn the purpose of a firewall, how applications/network traffic is allowed in and out of the firewall, and how next generation firewalls use application inspection to add additional protection to the network. First, you’ll explore the fundamentals of a firewall, learning how trust levels are used, and how the firewall passes traffic from trusted networks to untrusted networks. Next, you’ll discover how firewalls implement access control lists to filter traffic, as well how network address translation (NAT) is implemented. Finally, you’ll learn how next generation firewalls can add additional protections to the network by scanning for potential threats in application network traffic. When you’re finished with this course, you’ll have the skills and knowledge of firewall basics to better understand how this mysterious appliance operates in the network.

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What's inside

Syllabus

Course Overview
Introduction to Firewalls
Firewall Access Control Lists
Network Address Translation
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NAT in the Real World
The DMZ and Screened Subnets
Non-TCP Protocols and Firewalls
Next Generation Firewalls and Application Inspection

Good to know

Know what's good
, what to watch for
, and possible dealbreakers
Suitable for absolute beginners with no knowledge of firewalls
Suitable for IT professionals wanting to increase their knowledge of the operation of firewalls
Introduces fundamental firewall concepts such as network trust levels and access control lists
Provides insights into how next-generation firewalls utilize application inspection for improved network protection
Limited coverage of advanced firewall configurations and troubleshooting techniques
May require additional resources for hands-on practice and deeper understanding of firewall implementation

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Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Introduction to Firewalls with these activities:
Review Access Control Lists
Familiarize yourself with Access Control Lists, a foundational concept in firewalls, to enhance your understanding of firewall operations.
Browse courses on Access Control Lists
Show steps
  • Read the course materials on Access Control Lists.
  • Review the online documentation on Access Control Lists.
Firewall Resource Compilation
Expand your knowledge base and enhance your understanding by gathering and organizing relevant firewall resources, creating a valuable reference for your ongoing learning journey.
Browse courses on Knowledge Base
Show steps
  • Search for online resources related to firewalls, including articles, tutorials, and documentation.
  • Organize the resources into a structured and easy-to-navigate format.
  • Share your resource compilation with other students or professionals interested in firewalls.
Mentor a Junior Network Engineer
Solidify your understanding by guiding a junior network engineer, sharing your knowledge and gaining a deeper appreciation for the subject matter.
Browse courses on Mentoring
Show steps
  • Find a junior network engineer who is interested in learning about firewalls.
  • Meet with the junior engineer regularly to provide guidance and support.
  • Share your knowledge and experience in firewall configuration and management.
Five other activities
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Show all eight activities
Exercise: Configure Network Address Translation
Apply your knowledge of Network Address Translation by completing a hands-on tutorial to solidify your understanding of its practical implementation.
Show steps
  • Find a tutorial on configuring Network Address Translation.
  • Follow the tutorial steps to configure Network Address Translation.
  • Test your Network Address Translation configuration.
Firewall Configuration Exercises
Reinforce your understanding of firewall configuration through repetitive exercises, improving your ability to implement and manage firewalls effectively.
Browse courses on Firewall Configuration
Show steps
  • Find online exercises or challenges on firewall configuration.
  • Practice configuring firewalls based on different scenarios.
  • Review your configurations and identify areas for improvement.
Contribute to an Open-Source Firewall Project
Gain practical experience and contribute to the broader firewall community by participating in an open-source firewall project, enhancing your understanding and technical skills.
Browse courses on Software Development
Show steps
  • Find an open-source firewall project that interests you.
  • Review the project's documentation and codebase.
  • Identify an area where you can contribute.
  • Submit your code changes or documentation updates to the project.
Firewall Configuration Guide
Creating a comprehensive guide on how to configure a firewall will reinforce your understanding of firewall settings and options. You will also learn how to document your work, which is an essential skill for IT professionals.
Browse courses on Firewall Configuration
Show steps
  • Research best practices for firewall configuration
  • Document the steps involved in configuring a firewall
  • Create a step-by-step guide that includes screenshots and examples
  • Proofread and edit your guide for clarity and accuracy
Blog Post: Firewall Best Practices
Enhance your knowledge and share your insights by creating a blog post on firewall best practices, deepening your understanding and contributing to the wider community.
Browse courses on network security
Show steps
  • Research and gather information on firewall best practices.
  • Organize your thoughts and create an outline for your blog post.
  • Write and edit your blog post.
  • Publish your blog post on a relevant platform.

Career center

Learners who complete Introduction to Firewalls will develop knowledge and skills that may be useful to these careers:
Security Analyst
Firewalls play a critical role in network security. They help to prevent unauthorized access to the network and protect it from attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a security analyst.
Cybersecurity Engineer
Firewalls are essential tools for cybersecurity engineers. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a cybersecurity engineer.
Security Architect
Firewalls are one of the most important security tools for security architects. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a security architect.
Network Administrator
Firewalls are essential tools for network administrators. They control access to the network and help protect it from security threats. This course will provide you with a strong foundation in firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a network administrator.
Network Security Engineer
Firewalls are an essential part of network security. They help to control access to the network and protect it from attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a network security engineer.
IT Security Engineer
Firewalls are one of the most important tools for IT security engineers. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as an IT security engineer.
Information Security Analyst
Firewalls play a critical role in information security. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as an information security analyst.
Security Consultant
Firewalls are an essential part of security consulting. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a security consultant.
Network Engineer
Firewalls are essential components of any network. They help to control traffic flow and protect the network from security threats. This course will provide you with a strong foundation in firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems.
Chief Information Security Officer (CISO)
Firewalls are an essential part of an organization's information security program. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a CISO.
Penetration Tester
Firewalls are one of the most important tools for penetration testers. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a penetration tester.
Cloud Security Engineer
Firewalls are also essential for cloud security. They help to protect cloud-based networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a cloud security engineer.
Auditor
Firewalls are an essential part of an organization's security controls. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as an auditor.
Risk Manager
Firewalls play a critical role in risk management. They help to protect networks from unauthorized access and attacks. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a risk manager.
Forensic Analyst
Firewalls can be a valuable source of information for forensic analysts. They can help to identify the source of attacks and track down attackers. This course will provide you with a deep understanding of firewall technology. You will learn how firewalls work, how to configure them, and how to troubleshoot problems. This knowledge will be essential for your success as a forensic analyst.

Reading list

We've selected 13 books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Introduction to Firewalls.
A classic work in the field of network security, Firewalls and Internet Security provides a comprehensive overview of firewall technology.
Provides a comprehensive guide to firewall management. It covers topics such as firewall planning, testing, and troubleshooting. It valuable resource for network administrators and engineers who manage firewalls.
Provides a practical guide to firewall design, deployment, and management. It covers topics such as firewall types, traffic filtering, and intrusion detection.
A comprehensive guide to TCP/IP network administration, including coverage of firewalls.
A classic work in the field of computer security, Computer Security provides a comprehensive overview of firewalls and other security technologies.
A technical guide to firewall design and implementation.

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