How to set up the University of Manchester VPN on Debian linux

(well, as of 2009/09/21 when I tried it)

I just did this on my default install of Debian testing.

        <policy user="at_console">
                <allow own="org.freedesktop.NetworkManager.vpnc"/>
                <allow send_destination="org.freedesktop.NetworkManager.vpnc"/>
        </policy>

VPN setup screenshot