Chapter 10 Install and System Administration for FortiOS 5.0 : FortiGuard : Security tools : IP and signature lookup
  
IP and signature lookup
The IP and signature lookup enables you to check whether an IP address is blacklisted in the FortiGuard IP reputation database or whether a URL or email address is in the signature database.
http://www.fortiguard.com/antispam/antispam.html
See Also
URL lookup
Online virus scanner
Malware removal tools
FortiGuard Services
Antivirus and IPS
Web filtering
Email filtering
Security tools
Troubleshooting