DNS now working in VirtualBox client after network switch

I have a laptop and regularly change network connections. I don't shut the machine down but let it hibernate in between. I use VirtualBox, windows host (sorry, this is it for now but I promise it will change soon ;o), Linux guest.

I had to configure the Google free DNS service in the Linux guest so that the DNS works even when I change network (going home from work, etc.) :

http://code.google.com/speed/public-dns/docs/using.html

Virtualbox mounting a Windows host directory under Linux client

C_DRIVE /C_DRIVE vboxsf uid=acizmeli 0 0


or


Documents /home/me/Host vboxsf uid=1000,gid=1000,nodev,noexec,nosuid,auto,rw 0 0

(http://ericgazoni.wordpress.com/2011/03/25/mounting-virtualbox-osx-share-on-ubuntu-guest/)