Connect to a Zyxel VPN ATP200 using a Ubuntu Server

Hi!

Hope everyone is fine :)

I have a ATP200 with VPN configured, and till now i only connected to the VPN using Windows Machines.

Today i want to connect to the VPN using a Ubuntu Server, and i am having issues connecting, tried openconnect, vpnc etc, and till now i couldn't achieve it.

Can someone support me, with instructions or any manuals, in order to be able to connect to the VPN using a Ubuntu Server?

Thanks,

Regards,

<Martim>