How to use Caltech VPN (to read journal off campus, or to use facebook in China)

The instructions are here:
https://www.imss.caltech.edu/help/vpn

But to put it short, if you are a Mac user, go to vpn.caltech.edu and install the software specified.
Run the Cisco software you installed(I use the second tunnel, all traffic) and, most importantly, Restart your wifi and Browser.
Then you will be connected to the real world.