Some online services the University of Heidelberg offers are only available if you are a part of their VPN. I don't want to use one of these crappy Cisco-tools, but fortunately there is vpnc.

Assuming the installation worked fine, you just have to enter the information in /usr/local/etc/vpnc.conf. It looks like that:

IPSec gateway
IPSec ID tunnel
IPSec secret "group pass"
Xauth username "your login"
Xauth password "your pass"

Unfortunately, they don't tell you the group password. But you can decode it once you have downloaded the configuration file from the "URZ" homepage.

I needn't tell you that the decoder mustn't be used for malicious just have fun.