Chapter 3 Authentication for FortiOS 5.0 : Configuring authenticated access : VPN authentication : Configuring authentication of SSL VPN users
  
Configuring authentication of SSL VPN users
The general procedure for authenticating SSL VPN users is:
1. Configure user accounts.
2. Create one or more user groups for SSL VPN users.
See “Configuring user accounts and user groups for SSL VPN” in the FortiOS Handbook SSL VPN chapter.
3. Enable SSL VPN.
4. Optionally, set inactivity and authentication timeouts.
5. Configure a security policy with SSL VPN action. Add an identity-based rule to allow access for the user groups you created for SSL VPN users.
See “Configuring security policies” in the FortiOS Handbook SSL VPN chapter.