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Select the one that you would like to use and it will start up in a new window. When you are finished with a session you can log out of it as normal. This will leave an ssh session open to the server so that any further sessions on that server will not need to go through the Duo authentication. To disconnect from the server completely, either exit FastX or right-click on the server name and select Disconnect.
Resuming sessions
Sessions can be resumed if they are not terminated when the FastX program is closed. Note that FastX sessions are dependent on an ssh connection to the server but are actually distinct. This means that you can disconnect from a server but leave the session running and reconnect to it later. In this scenario, the backend ssh connection to the server has to be established new so this will require Duo authentication. But once the ssh connection is up FastX will find any existing connections on the server. What is important to keep in mind here is that there are more than one login node per HPC system. Neon has 2 login nodes and Helium has 3. In each case they are round robin resolved so that a connection to neon.hpc.uiowa.edu will resolve to either neon-login-1.hpc.uiowa.edu or neon-login-2.hpc.edu. This is important to remember when trying to reconnect to sessions as your new connection will need to land on the same host as the session that you want. If you do this frequently you may want to create explicit connections for each login node.
- Neon
- neon-login-1.hpc.uiowa.edu
- neon-login-2.hpc.uiowa.edu
- Helium
- helium-1.hpc.uiowa.edu
- helium-2.hpc.uiowa.edu
- helium-3.hpc.uiowa.edu