Using NDS off site

Use the NDS2 interface:

nds40.ligo.caltech.edu:31200

The instructions below are BAD and will break things, so don't ever use them

Internally, the NDS1 server at the 40m has the hostname fb or fb.martian and listens on port 8088.

Off site, one way to get access to NDS is to use SSH tunneling. On your own computer, run the following command:

$ ssh -f controls@nodus.ligo.caltech.edu -L 18088:fb:8088 -N

The -f option tells SSH to go into the background after starting. The controls@nodus.ligo.caltech.edu argument tells SSH to log in to the server nodus.ligo.caltech.edu with the user name controls. The -L 18088:fb:8088 option tells SSH that it should redirect traffic on port 18088 on the local side to port 8088 on host fb on the remote side. The -N option tells SSH not to execute any command on the remote side.

You'll next be prompted for a password, so give the password for controls@nodus.

If you have done everything correctly, it will look like nothing has happened, but really an ssh process has started in the background, listening on port 8088 on localhost.

Now, start using your favorite NDS client tool: ligoDV, pynds, etc. Use localhost as the server and 18088 as the port. Enjoy!

Note: In order to disable the SSH tunnel, you will need to hunt down the ID of your background ssh process and then kill it.