In order to use these services from the Internet, you must first connect to a proxy server running on the firewall on the department's protected network, using either ftp or telnet. The proxy server will demand that you identify yourself (or: you say who you are) and authenticate yourself (or: you prove that you are who you say you are).
To authenticate yourself, you will need a credit-card size piece of paper, called the S/Key-card.
Don't forget to find out how to obtain your personal S/Key-card.
Refer to this if you lost your personal S/Key-card.