How can I run Openssh daemon in debug mode ?

  • Sometimes it may be necessary to see directly how the openssh daemon reacts to startup or connection requests, to be able to locate daemon-related problems. 


    • Stop Openssh SSHD (system name:OpenSSHServer) service
    • Right click Start a Unix Bash Shell from Copssh start menu (assuming that you have admin privileges)
    • Enter the following command from the bash prompt:

    /bin/sshd -p <listening port> -D -d -e

    This will start openssh daemon in standalone debug mode and messages will be displayed on the screen. You may specify up to three -d for increased output verbosity.

    • Try to initate a putty session and watch messages at the server side.

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