Welcome and thank you for selecting Fortinet products for your network protection.
The firewall policies are the key component of FortiOS that allows, or disallows, traffic to
and from your network. It is through the firewall policies you define who, what and when
traffic goes between networks and the Internet.
This guide describes the firewall functionality of FortiOS on all FortiGate units. It includes
the purpose of the firewall, how traffic moves through the FortiGate unit, the components
involved in the firewall and its policies.
This guide also describes both simple how to steps to configure the basics, and some
more involved examples to demonstrate how firewall policies can be employed within
FortiOS. Finally, this guide also provides some troubleshooting advice should problems
arise when creating firewall policies.
Because of the magnitude of features, this guide will only touch the surface of traffic
shaping, Universal Threat Management (UTM) and protection profile information. Other
guides are available with more in depth content.