From the doc: '-Advanced and Fast scanning capabilities. This tool doesn't block againts a firewall and it's fast!!!. -Total service's banner info added: Includes web server detection version and named version, and the classical too (ftp, pop ...). -Writes reports with info of the host analized to the hard disk. -Remote OS detect feature (Thanks to savage for QueSO). -If detects vulnerabilities, the tool chooses the right exploits based on version, vendor and OS of the services that run on the remote host and ask you on a interactive way if you want to run these exploits in order to check the real danger the remote host can recieve and discard false positives. -The tool includes, for now, 69 remote exploits for various OS and various services.'