To access certain cluster login nodes, from outside your institute's network (e.g., from home) you need to set a so-called VPN (Virtual Private Network). By setting up a VPN to your institute, your computer effectively becomes a computer on your institute's network and will appear as such to other services that you access. Your network traffic will be routed through your institute's network. If you want more information: There's an introductory page on HowStuffWorks and a page that is more for techies on Wikipedia.

The VPN service is not provided by the VSC but by your institute's ICT centre, and they are your first contact for help. However, for your convenience, we present some pointers to that information: