Setting up sFTP operations

So we are in the midst of setting up a bunch of sFTP operations where we will have Ensemble send files to our various customers.

My questions about the set up are these:

1) For a simple test, I set up an Operation using EnsLib.FTP.PassthroughOperation.  Is this the one I should be using?

2) if the receiving system has a username and password, then all I have to do is put that username and password into a Credential and assign that credential to my operation correct?

3) if the receiving system's directory is just the root directory, do I need to put anything in File Path?

4) Since this is an sFTP, I set the port to 22.  My question is, since this is an sFTP, do I also need to set up an SSL Configuration?  If so, what needs to be in it?

I am asking these because I was unable to connect to the site via Ensemble.  However, if I went into Linux and did the sFTP operation, everything worked.

Just trying to figure out what I did wrong on the Ensemble operation set up.

Thanks,

Tim