Connecting from outside

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In all the following methods to connect to our servers, you must choose a host to connect to. Usually you'd choose a public server such as river. Note that the lab machines are closed to students other than the ones that log in locally.

Contents 1 SSH (secure shell) connection 2 Telnet connection 3 Graphical (X) connection 4 See also

SSH (secure shell) connection

To open a remote shell on a CSE host using SSH, you need to ssh to gw.cs.huji.ac.il as user USERNAME%HOSTNAME.

For example, if your username is amnon and you want to connect to river, use the following command: ssh amnon%river@gw.cs.huji.ac.il You will be prompted for your OTP password, and then for your regular password.

There's a good SSH client for Windows called PuTTY.

Telnet connection

In order to telnet to a CSE host, you must go through the CSE gateway. The following is the procedure to telnet to a CSE host:

1. Telnet to gw.cs.huji.ac.il.
2. Login using your CSE username and your OTP password.
3. Connect to the desired CSE host by doing: c HOSTNAME. For example: c river
4. Login to the host using your CSE username and your regular password.

Graphical (X) connection

Using this connection type you can run applications which normally use a graphical user interface (GUI), such as emacs. For this to work you need to run an X server on your computer. The applications you run on the remote CSE machines connect to the X server in order to display windows on your own computer.

• If you're using Linux then you probably already have an X server running. Just do ssh -XC USERNAME%HOSTNAME@gw.cs.huji.ac.il to obtain a shell on the CSE host.

• On Mac OS X, you first need to run X11 (usually under /Applications/Utilities/X11). Then, from the opened xterm, run ssh -XC USERNAME%HOSTNAME@gw.cs.huji.ac.il as in Linux.

• On Windows, you need to install and run an X server and an ssh client. Following are instruction for setting up and connecting using Xming and PuTTY:
  1. Download and install Xming, make sure to choose full installation.
  2. Launch Xming using the newly created Xming Shortcut (not Xlaunch)
  3. Download PuTTY and Launch it, It doesn’t require any installation.
  4. In the Session category, enter username%hostname@gw.cs.huji.ac.il where username is your cs login and csmachine is the server you wish to connect:
     
  5. Scroll down the Category column on the left, open the SSH section and select X11, Mark the Enable X11 forwarding option:
     
  6. At this point you can optionally go back to the Session category and save these settings as a preset.
  7. Press the Open button and enter your OTP when prompted. Next you'll be asked to enter your regular UNIX password.

After following the above steps you can start your X application on the CSE host.

See also

• FTP on how to transfer files between your computer and the CS file system