After much effort, we now have a packaged version of the Juniper VPN Linux client available! We also have a helper script which allows you to easily connect from your Linux desktop. It’s available for rpm and deb based distros, and as a tgz if you’re using a different package manager.
The instructions have been published here: http://www.bris.ac.uk/it-services/advice/homeusers/uobonly/uobvpn/howto/linux/
The old PPTP based VPN will be switched off on the 30th June 2014 and anyone using linux to VPN in will need to migrate to the new service before then.