ECE Undergraduate Linux Laboratory Security Page

NOTE: Due to security issues, access to ullab.ece.clemson.edu is now limited to on-campus addresses only. To connect from a machine that's off campus, you'll now have to first ssh to access.ces.clemson.edu and then ssh to ullab.ece.clemson.edu (or from some other machine that's on campus). Please realize that access.ces.clemson.edu is a College of Engineering and Science UNIX machine and not a ULLab machine. You'll have to have a CES UNIX account before you'll be able to ssh to ullab.ece.clemson.edu. If you don't already have a UNIX account, please know that every CES student is entitled to one. See www.ces.clemson.edu/cns/unix.htm for details about obtaining an account.

Only one machine in the Undergraduate Linux Laboratory can be seen from the outside world. That machine is named 'ullab.ece.clemson.edu'. Once you connect to it (see below) you will be asked to move to another machine (through ssh, see below) in the lab. Every other machine in the Undergraduate Linux Laboratory is labeled ullab1 through ullabN where N is some increasing number as we get new machines.

The linux lab is firewalled. This has a lot of good security ramifications but all that you need to worry about is that you will have problems logging into the lab and copying files into the lab. To get into the lab you will not be able to use telnet (from windows) or rlogin or rsh from the Sun machines. Instead you must use a secure connection, like 'ssh'. The sun machines have this command, so if you want to login to the lab type:

ssh ullab.ece.clemson.edu
from the Sun machine that you are logged into. Note, the CES clan has finally switch to requiring users to use ssh (like us), so you'll have to connect to their machines similarly. If you want to connect directly from your Windows machine then I know at this time of two programs which allow this: TeraTerm and Putty - both are linked from the download page off the main linux lab web page.

The next question is how can you copy files to the lab if you are writing them on your home PC. You cannot use FTP as this is also very insecure. Instead, you can use the command 'scp' from the Sun machines. Anyway, to copy a file from the Sun machines to the undergraduate linux lab you would do the following:

scp filename ullab.ece.clemson.edu:/users/userid
The filename would be your filename that resides in the current directory on the Sun machine you are logged into. The userid would be your username, like 'ndebard'. You must do the colon and the slash and everything in that order with those spaces.