Finally there is a tool worth using for vpn besides the default from Juniper that works on Linux. Its rather quick to get started.

Install Arch

$ pacman -S openconnect

Install Ubuntu

$ apt-get install openconnect

Install Fedora/RedHat

$ dnf install openconnect

or this if you have older Fedora/RedHat

$ yum install openconnect

Once you have it installed you may need to reboot. This will allow proper access to /dev/net/tun

Run it

$ openconnect --juniper vpn.domain.com