SSH debugging is not currently enabled. 

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How to enable SSH debugging to assist with issues you may encounter with Discovery.

1. Choose MID server you want to enable this on.
2. Click Configuration Parameters tab
3. Click New
4. Choose mid.ssh.debug from the drop down.
5. Set it to true.
6. Submit

See images for reference below.

You can verify this by grabbing the MID logs and looking for mid.ssh.debug:

• MID server Parameters