Chapter 3 Authentication for FortiOS 5.0 : Examples and Troubleshooting : RADIUS SSO example
  
RADIUS SSO example
A common RADIUS SSO topology involves a medium sized company network of users connecting to the Internet through the FortiGate unit, and authenticating with a RADIUS server. RADIUS SSO authentication was selected because it is fast and relatively easy to configure.
This section includes:
Assumptions
Topology
General configuration
Configuring RADIUS
Configuring FortiGate regular and RADIUS SSO security policies
Testing