Ubuntu 12.04 host – Virtualbox 4.1.12 Guest=Windows 7 – Network will not connect.

I'm using Ubuntu 12.04 on an Acer Aspire 5742-7645 laptop with 4GB memory, Intel Core i3 processor, Intel HD Graphics, DVD drive, 802.1 b/g/n, and 500 GB HD. I connect to my router via a wireless connection.

I have installed Virutalbox 4.1.12 from the Ubuntu Software Center and installed Guest additions 4.1.12 in the Windows 7 guest session.

I have Windows XP and Windows 7 installed as guests in Virtual box The network settings are different for XP and 7 – see below. Network Settings XP guest = Adapter 1: PCnet-FAST III (NAT) - Network works perfectly and has worked well for several years.

Network Settings Win 7 = Adapter 1: Intel PRO/1000 MT Desktop (Bridged adapter, eth1) Promiscuous Mode = allow all Cable connected = checked

When I originally installed Windows 7, I tried NAT and the guest network would not connect. Once I changed the setting to the above (Bridged) the Network worked perfectly. However, what I believe is after updates (not sure if it was an Ubuntu or Windows update) the guest network stopped working and I can not get it to connect.

Interfaces file content

auto lo
iface lo inet loopback

Ifconfig yields
lou@lou-Aspire-5742:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 1c:75:08:09:f6:5c  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth1      Link encap:Ethernet  HWaddr 4c:0f:6e:7c:9f:01  
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::4e0f:6eff:fe7c:9f01/64 Scope:Link
          RX packets:18095 errors:2 dropped:0 overruns:0 frame:24344
          TX packets:9281 errors:47 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:5301926 (5.3 MB)  TX bytes:1441885 (1.4 MB)

lo        Link encap:Local Loopback  
          inet addr:  Mask:
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:3208 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3208 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:294088 (294.0 KB)  TX bytes:294088 (294.0 KB)

Ipconfig yields the following:

Windows IP Configuration

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . : 
   Link-local IPv6 Address . . . . . : fe80::38ba:dbca:a21d:c3d1%13
   Autoconfiguration IPv4 Address. . :
   Subnet Mask . . . . . . . . . . . :
   Default Gateway . . . . . . . . . : 

Tunnel adapter isatap.{B292E440-679D-4FC5-8E34-77D6804669C8}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 

Tunnel adapter Local Area Connection* 11:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 

I'm not sure what else to do. Can someone provide the troubleshooting steps to determine what the problem is and possible solution?


Chances are that the kernel has been updated but the virtualbox drivers haven't been rebuilt. Try commands:

find /lib/modules | grep vboxnet
uname -a

To fix that use sudo /etc/init.d/vboxdrv setup

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