Internet works perfectly on host (Ubuntu 13.04, 32 bit, fully updated) but cannot connect to internet on guest Windows 7 (under Virtualbox 4.2). Have tried NAT and Bridge Network - none worked. I had internet connection in the guest OS a couple of months ago, but I haven't tried the virtualbox since and now it's gone for some reason. I would be grateful if someone could help me re-connect the windows OS back online (without the need to format my computer or to uninstall and re-install the guest OS). Thanks!
I was having the same problem on Ubuntu 12.10 64bit using Virtualbox 4.2.22. Here are the steps I took to solve my problem:
- Open Virtualbox Manager
- Select the machine you cannot get internet on in the left pane
- Click the Settings button in the top menu
- Click Network in the left pane in the settings window
- Switched to Bridged Adapter in the Attached to drop-down menu
- Select the name of the network adapter you are currently using on your host machine. I am using wireless so I chose eth0 which is my wireless network adapter. You can check which adapter you are currently using by opening the terminal (CTRL+ALT+T by default) and running
ifconfig. It will probably be the eth adapter that shows an inet addr and shows data transfer next to RX bytes.
- Under Advanced, make sure the machine is using the Desktop Adapter Type
- Under Advanced, make sure Promiscuous Mode is set to Allow All
- Under Advanced, make sure Cable connected is checked on
- Hit OK to save your changes
- Start your VM
At that point you should be able to start a web browser in your VM and get a connection. This video provided the information I listed above, even though they are using a Windows 7 host with a Windows Server guest.
This is an image showing an example of the settings you need (taken from this answer).
For wireless to work, in my machines anyway, the WiFi MAC address in Settings must match the hardware, and wlan0 must be selected (when host Internet comes through wireless).
After gaining much more experience with this, I find:
- The initial network connection is very finicky and inconsistent.
- Once made, it reconnects every time with no problem.
- The MAC address does not need to match the hardware (as initially stated).
- Because of 1., trouble with the VM Internet connection is best remedied by unbridging and/or changing the MAC, starting the VM, stopping, re-bridging, etc. Sooner or later, it will connect.
Here's a quick HowTo:
First click your network icon and select Connection Information.
On the Hardware Address line, copy the MAC address (the six digit-pairs separated by colons).
Paste in a neutral location such as a text editor, where the colons can be edited out (remove them). Copy the rendered 12 characters remaining.
Note: Attempts to paste the MAC with the colons still present will fail.
With the latest VirtualBox (VBox) available from *buntu repos, v4.1.12 at this writing:
In VBox, with the VM selected, click Settings. Click Network and on that page, typically under the Adapter 1 tab, click Advanced.
Click the dropdown at Attached to: and select Bridged Adapter. Highlight the 'Mac Address' data and delete it. Paste the true MAC address copied above.
Check parameters are set as follows, in order from top-to-bottom:
- Enable Network Adapter: checked
- Attached to: Bridged Adapter
- Name: wlan0
- Adapter Type: the one with "Desktop" in the name
- Promiscuous Mode: Allow All
- Mac Address: as copied and pasted above
- Cable Connected: checked
Note that in the VM window, for Win7 at least, the WiFi symbol appears different from what it is in native mode. But WiFi is running nonetheless.
If it was working fine until recently, but suddenly your VM seems to have lost network connectivity while the
host seems to have normal internet connection, then maybe just try the following steps.
Step 1: Right click on the network icon for the VM, Which most of the time will be on the bottom right corner in windowed mode.
Step 2: Toggle off the button named "Connect Network Adapter" and after waiting for like 10 seconds toggle it back on.
Another solution: If you are on windows Host, Go to
Control Panel\Network and Internet\Network Connections right click any of the
Virtualbox adapter and select
Diagnose, let it do its thing and if it finds some anomaly with the adapter it will give you a prompt to reset the adapter by
Apply the recommended solution/changes , you opt in for that, after its done, you most probably should have the network back to normal in your virtual machine.
I have to do this step almost regularly since I rarely shutdown my PC and always put it to sleep so after waking up I frequently encounter this issue.
I had the same problem with a VirtualBox VM (5.9.14) that was working previously and stopped working after a shutdown/reboot. In my case the VB option "cable connected" got disabled for some obscure reason. Enabling that again made everything work again (no need for promiscuous mode in this case since I'm not doing anything requiring this - no WireShark or anything of that kind) Bottom line: do not assume that the Network configuration for your VM is correct. If you have problems, review that part of the configuration.