Chapter 1 What’s New for FortiOS 5.0 : New features in FortiOS 5.0 Patch 3 : Support for NAT46, VIP64 and VIP46
  
Support for NAT46, VIP64 and VIP46
Security policies are now supported for NAT46, VIP64 and VIP46. They can be configured from the CLI, using the following commands:
config firewall policy46
config firewall vip64
config firewall vip46