I have installed a VirtualBox with an Ubuntu Server (16.04)on my Ubuntu 16.04 laptop. 

I want to create a virtual network. By reading some post on the web, it seems pretty simple but ...

So, I have configured like that: 

* In VirtualBox settings > network: NAT is empty, and in Host Only, I have vboxnet0 with 192.168.56.1 as IP, 255.255.255.0 as mask and DHCP empty
* I setup the virtual server, with card 1 = NAT and Private Host with name vboxnet0 and Authorize all.
Checkbox cable plugged is tick on.
* File /etc/network/interface contain this informations:

auto lo
 iface lo inet loopback

auto enp0s3
 iface enp0s3 inet static
 address 192.168.26.70
 netmask 255.255.255.0
 network 192.168.56.1
 gateway 192.168.56.1
 dns-nameservers 8.8.8.8 8.8.4.4

I try to ping host and guest but nothing is working. I miss something but what ?

Thanks for your help

**UPDATE 1**
Screenshots about configuration
[![ifconfig on VM](https://i.stack.imgur.com/7Xds9.png)](https://i.stack.imgur.com/7Xds9.png)
[![Settings](https://i.stack.imgur.com/zYMOa.png)](https://i.stack.imgur.com/zYMOa.png)
[![/etc/network/interfaces](https://i.stack.imgur.com/GIfuN.png)](https://i.stack.imgur.com/GIfuN.png)

I know I miss something but what?