If you want to configure Cisco VPN on Ubuntu 9.0.4 is very easy now.You don't need to install the Cisco VPN client - NetworkManager includes support for Cisco IPSec VPNs. NetworkManager attempts to keep an active network connection available at all times. It is intended primarily for laptops where it allows easy switching betwen local wireless networks, it's also useful on desktops with a selection of different interfaces to use. It is not intended for usage on servers.