Chapter 22 WAN Optimization, Web Cache, Explicit Proxy, and WCCP for FortiOS 5.0 : The FortiGate explicit FTP proxy : Security profiles, client reputation, device identification, and the explicit FTP proxy
  
Security profiles, client reputation, device identification, and the explicit FTP proxy
You can apply security profiles to explicit FTP proxy sessions. This includes antivirus, intrusion protection (IPS), application control, and data leak prevention (DLP) including DLP archiving. Security profiles are applied by selecting them in a ftp proxy security policy or an identity based policy in a FTP proxy security policy.
You can also enable client reputation for explicit FTP proxy policies.
The explicit FTP proxy is not compatible with device identification.