title: VirtualBox port forwarding not working with NAT adapter
body: <p>I'm trying simple port forwarding with VirtualBox and it appears VirtualBox.exe is listening on the host to the port, but not actually forwarding the connection to the guest. I've tried on multiple ports, and I've restarted VirtualBox several times. Guest to host connectivity, on the other hand, is fine. Here's the info:</p>
  
  <pre><code>Host: Win7 x64
  Guest: Win7 x64
  VirtualBox version: VirtualBox 4.2.10
  Firewalls: All firewalls on host and guest disabled.
  
  Virtual Box &gt; Machine Settings &gt; Network
   Adapter 1: 
    Attached to: NAT
    Cable Connected : True
    Port Forwarding:
     Rule 1: TCP, HostIP=127.0.0.1, HostPort=8081, GuestIP=127.0.0.1, GuestPort=8081
  
  On Host:
  [VirtualBox.exe]  TCP    127.0.0.1:8081         IBM-6KT5OPCF76P:0      LISTENING
  
  On Guest:
  I never get the connection request on port 8081 or any others I've tried.
  </code></pre>
  
  <p>Any ideas? I'd like to avoid using VirtualBox's bridged adapter for multiple reasons. I was under the impression that NAT port forwarding was relatively straightforward with VirtualBox.</p>
  
  <p>Thanks!</p>