Remote Access

Access to the HPC-clusters is limited from outside the TU Delft network for security reasons.
When you use a VPN-connection direct access from your desktop/laptop to the HPC is possible. You can use your application of choice for this connection.
When you don't use a VPN you should connect through a Bastion server, which is described below.

Bastion

The TU Delft offers two bastion servers. These servers can be used to tunnel your traffic to the HPC.

• linux-bastion.tudelft.nl for employees or guests.
• student-linux.tudelft.nl for students.

Console access

The explanations below are the simplest way to connect to a console on an HPC. Advanced configs describes more complex configurations which save time when regularly using the connection.

Command line

When your desktop/laptop supports ssh from the console, you can connect to the bastion server and from there you can connect to the HPC:

  [user@home]$ ssh <netid>@linux-bastion.tudelft.nl
    netid@linux-bastion.tudelft.nl's password:
  [netid@bastion]$ ssh <netid>@hpcXX.tudelft.net
    netid@hpcXX.tudelft.net's password: 
    Welcome
  [netid@hpcXX]$

• Replace <netid> with your NetID (also remove the <>)
• When your a student replace <netid>@linux-bastion.tudelft.nl with <netid>@student-linux.tudelft.nl
• Replace <netid>@hpcXX.tudelft.net with the HPC you are connecting to.

Putty

When your desktop/laptop doesn't support ssh from the console, you can use Putty (it may already be installed).

• Session Settings
  Fill in the name of the TU Delft SSH server linux-bastion.tudelft.nl (student-linux.tudelft.nl for students), and select the SSH protocol (port 22):
  
• OPTIONAL: Connection>SSH Settings
  Select Share SSH connections if possible (this means that you will not have to authenticate when you start a second session):
  
• OPTIONAL: Connection>SSH>Tunnels Settings (This allows other applications to tunnel trafic through the bastion host)
  
  • Source Port: 1080
  • Dynamic & Auto
  • Press "Add"
• Session Settings
  To store these session settings, go back to the session tab, and save the settings under a session name. To activate a stored session, double-click on the session name:
  

Once you're connected to the bastion server you can use the locally available ssh to connect to a HPC:

  [netid@bastion]$ ssh <netid>@hpcXX.tudelft.net
    netid@hpcXX.tudelft.net's password: 
    Welcome
  [netid@hpcXX]$

File Transfer

The best method for transfering files depends on where you want to store your files:

1. Files in your home directory on HPC are only available within HPC
2. Files on Network Shares are available on other locations (such as a TU Delft workplace, weblogin.tudelft.nl or other HPC clusters)