***********************     Secure Shell Notes      ****************************

  Some points about remotely accessing departmental computers via a secure
  shell connection. 
 
  * To connect from Linux use the "ssh" command.

    Under Windows, from the Programs->Unix  menu, run "SSH Secure Shell".

    Secure Shell is freely available, from SSH COMMUNICATIONS SECURITY CORP 
    under a non-commercial licence. "PuTTY" is another freely available -  
    though more basic - ssh client for Windows.

  * Connections can be made from within the department to 'linux01-20' or 
    externally to 'ssh1', 'ssh2'.

    Note that a fully domain qualified host name is needed for external 
    connections. E.g. use "ssh1.csc.liv.ac.uk".
  
  * The identity of remote machines can be verified via its public host
    key stored on the local system: If you have connection problems verifying
    a departmental host then you may need to install an updated public key 
    (Linux machine host keys are periodically updated during system upgrades). 

  * If you have doubts about the validity of a public key it is best
    to telephone technical support; so that the "fingerprint" of the key
    can be verified.

  * As an alternative to using password authentication, you can generate 
    a personal public/private encryption key plus an associated pass phrase.

    The public key is made available from your departmental account 
    and the private key should be kept (securely) on your personal 
    computer.

********************************************************************************