Jane, To access your SME box from a remote location you must first enable the remote access features from server-manager, allowing public access to SSH. This will allow Internet users to access your server as well as LAN users.
By default only root and admin can login to the server. To change this and allow regular users to access it you must change the user shell. The command is chsh -s /bin/bash username. Do that for each user. Now the user will be
given access to a bash shell on the server. If your users are logging in from Linux machines they can use the ssh client on there workstations ssh -lusername servername and then login. If your using Windowz machines you can get a great sshclient from
www.ssh.com. Download the Win32client and install
it on the workstations. You will see the Interface is easy to use all you have to do is enter the servername username and password.
Hope that helps. Jason