Virtual Box or Ubuntu?

[Derek Broughton]

Gunawan wrote:

> Dear All,
> I have install ubuntu hardy heron as guest operating system on my windows.
> I use Virtual Box with NAT.
> Strange. I could ping to one external ip address for example my windows
> have 192.168.11.100.
> I could ping successfully to 192.168.11.50 inside my ubuntu but can get
> reply from another address.
> for example I could not get reply from 192.168.11.55.

192.168.* addresses are, in theory, private and non-routable - this means
that there's no guarantee that you can get from one subnet to another, and
iirc there's no way to make VirtualBox use anything but a 10.* address for
NAT, which means its always on a different subnet from your 192.168 LAN. 
In practice, sometimes these addresses _are_ routed, but if you can ping
192.168.11.50, imo you just got lucky.
-- 
derek