The SFTP-gateway allows you to use an external (SFTP enabled) computer to access your files on the university network.These are the files in your Linux home directory, on your P:-disk and in folders that you were authorized for on the J:-disk.
To use this service from a Linux computer, you need a Linux home directory. You can request one with the form
Request for Linux home directory
How to use the SFTP-gateway is described in this