Recently, I had to connect to a VPN using Cisco’s AnyConnect client. However this was quite difficult to obtain and install on ubuntu (my development machine).
So I finally decided to install the open source alternative of the AnyConnect client by using the following command:
sudo apt-get update && sudo apt-get install openconnect && sudo apt-get install network-manager-openconnect && sudo apt-get install network-manager-openconnect-gnome
Restart your Ubuntu and this should get you going.