Tried to install VPN by using the howto page provided by the University, but failed.

It turns out that to install and acess VPN is quite simply in Arch linux, only need to install a small package called openconnect which is a command line tool and is a available from the official respositories.

Installation

sudo pacman -S openconnect

Usage

Run openconnect as root as follows (change vpn.mycompany.com accordingly):

openconnect https://vpn.mycompany.com/

References

https://wiki.archlinux.org/index.php/OpenConnect

http://www.infradead.org/openconnect/connecting.html