One day, I suddenly couldn’t SSHFS mount via the head end server from any computer.

• could not ssh into the main head end server
• could ssh into the individual cluster units.
• could not sshfs mount from those cluster units
• could see my files via ssh.

Workaround:

Using a Windows guest virtual machine, I was able to mount the windows side of the network share (that I can typically always mount via sshfs) I could sftp and scp from one of the cluster nodes (not the head end node, since I couldn’t get in via ssh).

Probably a weird, incorrect workaround–but it got me my badly needed files in a pinch.