Background:

Firewalls may often provide the first line of defense between the public and private networks. This is accomplished by determining how to set up a firewall topology that best suits the needs of an organization and then designing and writing the rules (AKA: filters, ACLs, ACEs, etc.) to define how the firewall operates.

Instructions: Examine the firewall configuration shown in the topology figure at the bottom of this document. 1) Identify and give a name to segments 1, 2, 3, and the device. Be specific when you identify the device.

2) Using the common firewall rule structure shown below and using the deny by default philosophy, develop inbound (from the internet) firewall rules to define the operation of this simple topology. You should use the least number of rules possible.

Common Rule Structure:

Protocol

Source Address

Source Port

Target Address

Target Port

Action