it's quite popular problem and I've seen many solutions, but none of them worked for me. I've created virtual machine with Ubuntu 14.04 and haven't changed anything in Ubuntu configuration. With NAT I have internet connection in guest, but when I change network type to Bridged there is no internet connection on guest. Host works normally. The same problem is with machines created via VMware Player. I have installed VMware Player after working with VirtualBox so VMware Player network cards is not causing this problems. But sometimes I use vSphere Client, which was installed before VirtualBox and maybe this could cause this problem, but I haven't seen any network cards created by vSphere which could cause conflicts. Just in case I've turned off all network cars excluding host and VirtualBox network cards. Same result. VirtualBox Bridged Networking Driver is enabled.
Network card selected in Bridge configuration is the same card used by host system. Host internet connection is wireless, but when I tried to use wired host internet connection result was the same. I've tried turning firewall off, turning antivirus off and many other solution which I've found. Still no internet connection on bridged guest. I've sat with our network admin for more than hour and we still don't know what is wrong. All ideas are welcomed.
Something must be wrong on Windows 7 host side, but I have no idea what it could be.
In case it could be useful I am posting basic info from Ubuntu guest (Bridged Networking):
tomek@tomek-iic:~$ ifconfig
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:da:b6:6d brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:feda:b66d/64 scope link
valid_lft forever preferred_lft forever
tomek@tomek-iic:~$ cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
tomek@tomek-iic:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:da:b6:6d brd ff:ff:ff:ff:ff:ff
inet6 fe80::a00:27ff:feda:b66d/64 scope link
valid_lft forever preferred_lft forever
Best Answer
Check you're binding to the right interface. If you're using wireless then your ethernet port on host will appear as disconnected and the bridge won't work. I've used to have this problem using VirtualBox on Windows 7