Chapter 15 Unified Threat Management for FortiOS 5.0 : ICAP : Configuration Settings : Servers
  
Servers
The available settings to be configured regarding the profile are
IP Type (in the GUI) or IP address version ( in the CLI)
The options for this field in the GUI are 2 radio buttons labelled “IPv4” and “IPv4”. In the CLI the approach is slightly different. There is a field “ip-version” that can be set to “4” or “6”.