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.
Author Name: Ross Bagurdes
Author Description:
Ross has had a diverse career. He has a Structural Engineering degree from Milwaukee School of Engineering, but gave up the career shortly after graduating from college. Beginning in 1997, Ross began officially working in IT, implementing and supporting a paperless work order system for a Natural Gas Utility in Illinois. Since then, Ross has spent his years teaching and managing data networks. Ross spent 7 years at University of Wisconsin Hospitals and Clinics, supporting and managing the large … more

Table of Contents

• Course Overview
  2mins
• Introduction to Firewalls
  11mins
• Firewall Access Control Lists
  28mins
• Network Address Translation
  24mins
• NAT in the Real World
  28mins
• The DMZ and Screened Subnets
  15mins
• Non-TCP Protocols and Firewalls
  21mins
• Next Generation Firewalls and Application Inspection
  19mins