Ssh (Secure Shell) is a program used for logging onto a remote machine or for executing commands on a remote machine. It provides secure encrypted communications between two hosts over an unsecured network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel.

Keypair Authentication

As of June 2021 we no longer use password authentication, except for first-time users and users who have recently changed their passwords. You will need to upload public keys for each device you wish to use to connect to the CS department.  You can upload keys from your CS website profile page. After uploading your key, you will receive an email confirmation for the upload. You must reply to the email confirmation in order to actiavate your new key on the ssh gateway. 

The first time you log in to ssh, after entering the passphrase associated with your ssh key, you will need to enter your University password and do Duo 2-factor authentication. On subsequent logins, you will only need to enter the key passphrase (until you change your University password).

Detailed Step-by-Step Guides

Windows instructions

Mac OS X/Linux instructions

Android instructions


If you've followed the directions here, looked at the detailed instructions, and still can't get in, contact someone on the technical staff for help.