21. How do I copy files to/from Bohrg/Dominion?

21.1. General

There is no FTP access to or from Bohrg/Dominion. Neither can the "r"-commands be used, e.g., rcp. The only way to copy files to or from Bohrg/Dominion is to use scp or sftp.

21.2. Possible Connections

Recipes for copying files to and from Bohrg and Dominion are given below. By way of background information the following information can be noted:

To/from bohrg1/3

• SSH/SCP/SFTP connections from the outside world to bohrg1 and bohrg3 are permitted (DSA key and passphrase required), but
• SSH/SCP/SFTP connections from bohrg1 and bohrg3 to the outside world are blocked for security-related reasons.

To/from storage/dominion1

• Direct SSH/SCP/SFTP connections from storage and dominion1 to the outside world are possible (such connections travel through bohrg1 or bohrg3 transparently thanks to the wonders of network address translation).
• It is not possible to make any direct connection from the outside world to storage or dominion1 for security-related reasons.

21.3. Additional Info

The following information is also pertinent:

• home directories from storage are accessible read-only on bohrg1, as /home/bohrg/<username>.

21.4. Recipes

To download to your desktop machine from storage or dominion1

From you desktop machine, scp or sftp files from /home/bohrg/<username> on bohrg1.

Notes:

1. that this accessibility is read-only, so you cannot upload files to storage by this means;
2. it is not possible to download files from bohrg3 in this manner.

To upload from your desktop to storage or dominion1

1. From your desktop machine, scp or sftp files to /home/<username> on bohrg1 or bohrg3.
2. From bohrg1 or bohrg3, scp or sftp files to storage or dominion1.

Unfortunately, an upload requires two steps (though see below).

For those few running an SSH/SCP/SFTP service/daemon on their desktop machine, it is possible to reduce the previous recipe to a single step. N.B. Running such a service on your desktop machine has significant security implications, so do not do this unless you are confident that you fully understand patching, firewalls and intrusion detection.

To download to, or upload from, your desktop machine to/from storage or dominion1, if your desktop machine is running an SSH daemon

Login to storage or dominion1 in the usual way. From there, scp or sftp directly to your desktop machine. For example:

        storage> scp fred@desktop.ch.man.ac.uk:myfile myfilehere

or,

        storage> scp myfile fred@desktop.ch.man.ac.uk:myfilethere