title: Fail to install software during Debian installation on Virtualbox
body: <p>I'm trying to install a Debian Jessie (8.7.1) on a Virtualbox VM.</p>
  
  <p>During the Debian software installation, which correspond to the step after the choice of which software I'm want to install (see screen bellow)
  <a href="https://i.stack.imgur.com/VIN5r.png" rel="noreferrer"><img src="https://i.stack.imgur.com/VIN5r.png" alt="enter image description here"></a></p>
  
  <p>the installation is getting lock around 27% and then shows a fail screen (see screen bellow)
  <a href="https://i.stack.imgur.com/OZujs.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OZujs.png" alt="enter image description here"></a></p>
  
  <p>When I'm looking at <code>/var/log/syslog</code> after having aborted the installation, I can see this
  <a href="https://i.stack.imgur.com/C41VB.png" rel="noreferrer"><img src="https://i.stack.imgur.com/C41VB.png" alt="enter image description here"></a></p>
  
  <p>Apparently, the VM is unable to connect to some hosts.</p>
  
  <p>Is it normal ? Should I ignore this step ?
  Do you have some ways to explore? Or some ideas?</p>