You can download and install secure shell from NUNet: Internet Access -> Data Fellows SSH v2 or http://www.ess.neu.edu/ssh-client.
On a Mac
You can use the terminal application which is located in Applications -> Utilities.
In the terminal window, type the following:
ssh [YOUR USERNAME]@nuweb[YOUR SERVER #].neu.edu
This will connect you to the NUWeb server. You will be placed in your home directory on the server and there you should see all of your site files.
From here you can do things like password protect a directory, change your password, or view your site files. To exit from the terminal window type exit.