The error is now (on 17.10):
Unable to access location
Hostname not known
On 13.10 it said:
Oops! Something went wrong.
Unhandled error message: SSH program unexpectedly exited
I think the new error message is more informative so I'm going to mark
this Fix Released. Please revert to New if you disagree.
** Changed in: nautilus (Ubuntu)
Status: New => Fix Released
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nautilus: Does not handle connect to server well (error messages) if
no host or no network connection
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