VPN: visualize vhost website

[aleanto]

Hi,

i set 2 domains that uses dedicated IP. Example:

first-site.it (91.92.93.94)
second-site.it (91.92.93.95)

I use IP address to see this sites because i haven't buyed a domain.
Two sites are stored in:

var/www/vhosts

Now i use also a OpenVPN client to connect to my server. When connected i assigned 2 IP:

Server 172.16.0.1
Client 172.16.0.2

I need to see the site second-site.it through the VPN. Now when i use http://172.16.0.1 i see what is stored in this folder:

var/www/html

What i can do to that?

1) Change DocumentRoot in etc/httpd/conf/httpd.conf?
2) Change DNS for second-site.it?

Or what else?

Thanks

Alessandro