Zentyal on Root Server

[ajax26]

Hi to all

This is my first installation of zential, so ive some questions.

first, what i want.

Ive a root server with fixed ip adress, with only one nic. the provider is hetzner

i wont to install zenytal there,
i wont that my clients can connect over vpn, and samba shares (over vpn)

in this moment i can connect via vpn. if i use the intern ip (192.168.160.1) i cann connect to the zentyal webinterface.
also ping over vpn with intern ip is ok

but i cannot access any share is testet \\192.168.160.1\test but there i get an erro message.

must i tell samba extra the 192.168.160.1 ip. if the answer is yes, how must i do that ?