########## sftp - Secure FTP ########## 

    
    -=Transition from FTP to SFTP=-

    
	The FTP-protocol does not support encryption. That means
      that all data transferred, including username and password, is
      transferred as clear text. Therefore, the FTP-protocol is considered
      insecure.
    



    
	If someone uses a packet sniffer between the FTP-client and
      the FTP-server, they can easily pick username and password and
      potentially abuse it.
    



    
	To avoid this problem, System Management has decided to not support
      FTP on their system.
    



    
	SFTP is FTP's successor.



    
	When you use SFTP you actually connect the server with the 
      aid of SSH. A SFTP-server is started and you connect to this server
      through the SSH-connection you already have. There are different
      clients which will do this automatically for you.
    



    -=Windows=-

    
	There are a several clients for Windows with a graphical user
      interface. Windows-users usually prefer graphical clients, so we will
      explain some clients here. If you prefer command line client, read the
      Linux/Unix-part at the end of this article. Some of this information may apply to command
      line clients in Windows.
    



    
	
      
	SSH Secure Shell Client 3.2.9 is a commercial client from SSH 
      Communications Security.  The client is free for evaluation, non-commercial
      and university use.
    



    
	This client is pretty easy to use. Just start the SSH Secure File
      Transfer Client-program. Press the "Quick Connect" button.
      The server name should be /sftp.stud.ntnu.no/ and the port number
      should be 22. Then press "Connect".
    



    
	If this is the first time you connect to a server, you will be asked
      to add the server. Just answer Yes. Next you will be asked to provide a password.
    



    
	You will see the files from your home directory on the server in the
      right frame and local files in the left frame. Just drag'n'drop files to/from
      the server/your local machine.
    


    
    
	
      
	WinSCP 3.6.1 is open source SFTP- and SCP-client for Windows
      which uses SSH.
    



    
	*F-Secure SSH File Transfer* is a part of the F-Secure
      SSH Client. This client resembles the explorer view in Windows.
      You can borrow a CD with the F-Secure SSH Client from
      
	Orakeltjenesten.



    
	The connection procedure for F-Secure SSH File Transfer is the same
      as the connection procedure for SSH Secure File Transfer Client.
    



    
	To download a directory or file you can select it with the right
      mouse button. Choose "download" and browse to the
      destination directory. You can also use standard drag'n'drop functionality.
    



    
	To upload, you can use drag'n'drop. You can also press
      "the up arrow" on the button bar or choose
      "Operation->Upload". Browse for the file/directory you
      want to upload, and press "upload".
    



    -=Linux/Unix=-

    
	There are several different SFTP-clients for Linux/Unix. Here is a
      presentation of some of them.
    



    
	*Konqueror* is a web browser/file browser, which is a
      part of the KDE Desktop Environment. Newer versions of Konqueror supports
      SFTP. To use the SFTP-functionality you have to use sftp://user@host as
      the URL. You will be prompted for a password. When you are connected your
      home directory will be available as a regular directory in Konqueror.
    



    
	To make it easier to use Konqueror as a SFTP-client you can split
      the window into two frames. To achieve this use the Window-menu, and choose
      "Split View Left/Right" or "Split View Top/Bottom
      ".
    



    
	Select the frame you will use for the SFTP-connection and enter the
      URL e.g. /sftp://user@sftp.stud.ntnu.no/. In the other frame
      browse to the source/destination directory you want to use. Now you can
      drag'n'drop files between the frames. You can choose to either copy or move
      files. Choose what you prefer.
    



    
	*gftp* is a FTP-client that supports SFTP. This client
      has to be configured a bit to connect properly to our system. We will show
      you the minimal configuration to get things working, and leave further
      configuration to the user.
    



    
	When you run gftp you will get 8 menus (gftp 2.0.13). From the left
      these menus are: *FTP*, *Local*, *Remote*, 
      *Bookmarks*, *Transfers*, *Logging*, 
      *Tools* and *Help*.
    



    
	First we have to configure the SSH-options in such a way that it works
      on our system. Enter the Options-menu ("FTP->Options",
      or 'Ctrl+O'). You will see a new window with 7 tabs. From the left:
      *General*, *Network*, *FTP*, 
      *HTTP*, *SSH*, *Local* and 
      *Hosts*. First choose the *Network*-tab. Change the
      /Default Protocol/ (at the bottom) to /SSH2/. Then
      choose the *SSH*-tab. You will find three checkboxes. Mark the
      /Use SSH2 SFTP subsys/ checkbox.
    



    
	The client is now configured to interact properly with our system. The
      next step is to check the connection. In the host-field enter e.g.
      *sftp.stud.ntnu.no*. In the user-field enter your username. Press
      the "Connect"-button to the left. You will be prompted for
      a password. When you are connected, your home directory will appear in the right
      frame. You can use drag'n'drop-functionality to copy files.
    



    
	*sftp* is a command line program, which is a part of the
      OpenSSH package. sftp works almost like regular command line ftp in dos and 
      unix. You use the command "sftp user@host" to connect to
      a sftp-server.
    



    
	Type "help" when you are connected to list available
      commands and a description of these.
    



  Lenker fra artikkelen: SSH Secure Shell Client 3.2.9WinSCP 3.6.1Orakeltjenesten