Chapter 11 IPsec VPN for FortiOS 5.0 : IPsec VPN Overview : Types of VPNs : Policy-based VPNs
  
Policy-based VPNs
For a policy-based VPN, one security policy enables communication in both directions. You must select IPSEC as the Action and then select the VPN tunnel you defined in the phase 1 settings. You can then enable inbound and outbound traffic as needed within that policy, or create multiple policies of this type to handle different types of traffic differently. For example HTTPS traffic may not require the same level of scanning as FTP traffic.