SSH Key Fingerprints
The first time you connect to a computer using ssh or similar, it will display a key fingerprint which you should verify is correct. This is to prevent what’s called a man in the middle attack where an attacker pretends to be the machine you’re connecting to and intercepts your password or traffic. Our fingerprints are:
clic
RSA key fingerprints:
MD5:b7:21:b5:c7:3d:3d:ee:39:9e:3a:84:62:62:f0:c5:00
SHA256:fXXbsrEV0Clt25+NkwhB6bLnG2DirhJIC4guhaGJO7k
ECDSA key fingerprints:
MD5:d4:dd:4b:22:7a:67:a1:9c:a7:a2:df:a7:bb:d4:13:1d
SHA256:O7ynd4TcmR3m4R9oF/wAMqDmEdnpE7/E0VYg08IgrTA
compute
RSA key fingerprints:
MD5:31:78:59:e8:94:47:46:f6:db:07:90:0f:17:30:76:5b
SHA256:DxnitFKP67+8pSNreNh28AeEaUfyULLI9BbnTTNJhcU
ECDSA key fingerprints:
MD5:5d:18:35:1d:1b:01:73:47:f5:69:e4:f9:24:d8:b2:2b
SHA256:mLTAjJwwpiFzL14RyWY0yP4xlRIr7HvLmvUXVWJ2LXg
Connecting to CS Computers
For security reasons, we have turned off all commands that use clear text passwords such as telnet (use ssh instead), ftp (use sftp instead), and rsh (use ssh instead).
Via a windows ssh client
Obtaining Putty
To download Putty, please visit: http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
Click putty.exe and download it to your desktop
Double-click on the putty.exe icon on the desktop to start putty
In Host Name section, type in: “clic.cs.columbia.edu” or “compute.cs.columbia.edu”
Under Protocol, be sure to check “SSH”
Under Saved Sessions, type in “Cluster” and click Save. (From now on, you should be able to double-click on the saved session to connect to clic.cs.columbia.edu or compute.cs.columbia.edu.)
Click Open
For the first time you log into clic or compute using putty, you will see a new window pop-up with “Putty Security Alert: The server’s host key is not cached in the registry. You have to guarantee that the server is the computer you think it is. The server’s key fingerprint is: … .. .. “. Click “Yes”
You should see “login as: ” in the main window. Type in your username.
Type in your password and you should be logged into clic or computer
Please email problems to crf@cs.columbia.edu
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