id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host
6670,DNS breaks when moving a laptop from network to network,Ian,,"My use case: I have a Windows laptop running virtualbox.  Periodically I suspend the laptop and move it from one office to another.  I have an Ubuntu virtual machine in saved state when this happens.

What happens: the virtual machine, when I use it, can't resolve addresses.  Investigation reveals that it has the previous network's DNS server set.

I presume that the VM is never notified of the change of DNS server.  I don't know if the machine would receive a DNS server update if it is running.  I can see that it doesn't when it's saved.


A proposed solution:

Instead of giving NATted VMs the address of the remote DNS server, have a local DNS proxy running on the NAT gateway.  The local DNS proxy - running under the host OS - can forward the DNS requests to the laptop's currently set DNS server.  The VMs are isolated from host machine configuration changes.",defect,closed,network/NAT,VirtualBox 3.1.6,duplicate,,,Linux,Windows