This module sends a specially-crafted SSH Key Exchange causing the service to crash.
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/ssh/sysax_sshd_kexchange
msf auxiliary(sysax_sshd_kexchange) > show actions
...actions...
msf auxiliary(sysax_sshd_kexchange) > set ACTION < action-name >
msf auxiliary(sysax_sshd_kexchange) > show options
...show and set options...
msf auxiliary(sysax_sshd_kexchange) > run
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– Jim O’Gorman | President, Offensive Security