How to Start a Virtual Network Connection (VNC) Session

If you have already accessed the HPC Cluster, this exercise should be skipped.

Necessary Conditions to Start a VNC Session

  1. You have been vetted by the TG and now possess a TIQR token
  1. You have both PuTTY and TigerVNC downloaded on your computer

How to start a VNC Session

Please note: these instructions are designed for end-users with no experience or known preferences. These are the settings we believe will best serve most beginners. If you have other preferences, you should deviate from these instructions.

  1. Both PuTTY and TigerVNC are downloaded.
  1. Establish a VPN connection to Trigon.
  • Open eduVPN and login.
  • After your login has been approved but before you establish the VPN connection, select RU Donders Institute Trigon (Full Access) in the dropdown menu.

Figure: RU Donders Institute Trigon (Full Access) is selected in eduVPN

  • Now, click the slider to connect.

Figure: eduVPN is connected

  1. Start a VNC session
  • Open PuTTY
  • In the Host Name(or IP address) field, type
  • In the Port field, type 22
  • Click Open
  • Insert your DCCN credentials (the username for a person with Firstname Lastname is firlas)
  • Type vncmanager into the terminal
  • Type 4 to go to Set my VNC password and push enter to proceed
  • Set your password ( it can be anything you want but you MUST remember it), push enter to proceed, verify the password, push enter to proceed, type n to skip setting a read-only password, and push enter to proceed
  • Type 2 to go to Start a (VirtualGL) VNC server and push enter to proceed
  • Push enter on the first host on the list to start your VNC server at the least occupied access node
  • Push enter to select the default screen resolution for your computer
  • Push y to prevent VNC from overlapping the Windows toolbar then enter to proceed
  • Push 1 to select the xfce - Lightweight XForm CE WIndow Manager
  • Type in your DCCN password (NOT the VNC password you just set)
  • You should now be looking at a screen which says You have the following VNC servers running: if you do not, go to the start screen of the vncmanager and push 1 to go to List my running VNC servers and push enter

Figure: Running VNC servers in PuTTY’s vncmanager.

  1. Open up the VNC Graphical User Interface (GUI)
  • Open TigerVNC side-by-side PuTTY
  • In the VNC server: of TigerVNC, type the name of the VNC server which is listed in PuTTY and then push Connect

Figure: Selecting a VNC server in TigerVNC

  • Insert the VNC password you just set in the previous step and then push enter
  • You have now opened the VNC GUI - it should look similar to your Desktop with a few differences

Figure: Viewing the screen on your new VNC server with TigerVNC