Hello
I need your help. My machine has a MSN SLI motherboard with a AMD 64Bit Dual Core Processor, four 1.5TB drives, 8G memory and a build-in NVIDIA network controller. The host OS is windows VISTA Ultimate and is working great. I have install Fedora 8 and Fedora 10 guess VMs . My problem is, I can not get the network working on either guess VMs in VirtualBox 2.1.0. I tested Fedora 8 on a Dell laptop and everything including the network works without any problems so I believe there is something in VirtualBox I need to still do. I have tried configuring all four versions of the virtual network adapter hardware in VirtualBox with out any success. If anyone is running or successfully configure a network with this type of system can you please post the steps you used to get your VM network working. BTW I am posting this on both LinuxQuestions.org and forums.virtualbox.org. Thanks for any help…

What sort of network adapter settings are using?
Have you tried using NAT? Are you selecting the proper interface?
A few questions that you might need to answer for me to understand

1. Windows device manager it says NVIDIA nForce Networking controller
2. I have tried NAT, Host Interface Networking and also Internal Networking. In the VM when I ifconfig I get the following information:
inet addr: 10.0.2.15 Bcase 10.0.2.255 Mask: 255.255.255.0
I also can ping the host (VISTA) IP address from within the VM but can not ping or connect to the web.

Well, if you are able to ping the host, I presume it is not a problem with VirtualBox.
hmm...
Do you have any sort of AV/Firewall blocking this on Vista?

I also was able to ping other hardware machines (by IP address only) on my LAN from the VM. I just can not ping or access the internet.

If I understand this correct you are able to ping LAN machines, like 192.168.*.*
This makes me think you dont have proper DNS resolution, maybe
try pinging 4.2.2.2 or some other ipaddress.

With in the VM I can ping 4.2.2.2. What does this mean and how can I solve my problem? Thanks again for the help.

The dns servers arent properly set which do not resolve www.yahoo.com to the ip address.
Edit /etc/resolv.conf and add nameserver dns.ip

Sample Config, which should work for you

Thanks, for the help you have provided. A few things I have found:
1. By editing the /etc/resolv.conf allows me to ping the net but mozilla still returns an error and can not access the internet.
2. Network Manager Applet 0.7.0 says I am not connected. Across the top of the window is a icon of two blue terminals with a red "X" at the bottom right corner. Also when I run system updater, it says there is no connection. Where can I find configuration documentation for Network Manager?
3. Each time I restart the VM the only data in resolv.conf is 10.0.2.3.
4. Just for fun I install Fedora on a real machine and all worked without any problems. I even did not have to edit resolv.conf.