Week 2

A firewall is a device that prevents unauthorized access to a host or a network either from within the corporate environment or from the public network, such as the Internet. Generally, there are two types of firewalls:

  1. A hardware firewall takes the form of a closed proprietary appliance with its own operating system. This is considered faster, but a bit expensive.
  2. A software firewall is installed on a computer, and it utilizes the computer’s operating system. Firewalls use either hardware or software rules to filter incoming and outgoing traffic to the network.


  • How could you use firewalls to support organizational security?
  • What are the advantages and disadvantages of using hardware- and software-based firewalls?
  • What software tools could you use to assess the security of the firewalls used to protect your organization’s computer architecture?
  • How can you bypass blocked sites using anonymous website surfing sites?

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