Remote Access in Theoretical Physics

There are several ways of accessing your system and data remotely on the Theoretical Physics systems.

How to access Theoretical Physics computers via SSH

Systems within the Physics network may be accessed via the ssh proxy server

On Mac or Linux, edit the file ~/.ssh/config and add the lines

User your_physics_username

Host tplxdt123
User your_physics_username

If you are running code then we strongly recommend that you use screen this will allow you to disconnect and reconnect from both the remote system and the ssh gateway without stopping your code from running. Use ctrl-a h for help, ctrl-a d to detach, "screen -x" to reattach, "screen" from within screen to create another screen, ctrl-a N where N = 0...9 to switch screens, ctrl-a F to resize to current terminal.

Please Note: The first time that you ssh into either SSH gateway you will receive an error that your home directory isn't available. Ignore this message the home directory is mounted in /home/username.

The host key fingerprint is

Host key fingerprint is SHA256:7n9a7/YyMKWXWvHXYVTeMfbXp1Xblcjy8/s+6Mvytzk +---[ECDSA 256]---+ | . .+*| | . o.+@| | o ..X| | oo=o| | S o=+o| | . + +.+| | . .*. o| | . o+o+E.| | ..oo+B=BO| +----[SHA256]-----+

Note that this page may be accessed via SSL.

You can then ssh to your system with e.g.
ssh tplxdt123

to run graphical applications, use

ssh tplxdt123 -X

This is quite slow, however. If you need faster access, use x2goclient with as an ssh proxy (tick the box to enable that), and the same username and password boxes ticked. Set the session type to XFCE.

Virtual Private Network (VPN)

A Virtual Private Network (VPN) is a way of extending our internal network out to systems connected on the internet. Once connected via a VPN, a remote system appears to be connected locally to our network thereby getting all the facilities available to local users and avoiding blocks placed in intervening firewalls. All data passed via a VPN is encrypted.

Instructions for setting up VPN can be found here.

Once you have established a VPN connection then you can ssh directly into your desktop system.

Virtual Network Computing to Apple desktops

VNC allows you to take control of the Graphical interface of your Apple desktop remotely. Instructions on how to setup VNC can be found here

Linux Remote desktop

The Linux interactive machines can be accessed via x2go
This can be set up on your Linux desktop by request. Set the ssh gateway to, use the same username and password. Set the session type to XFCE.

Categories: Remote Access | Theory