virtualbox - dhcp issue with xubuntu guest on win7 host [migrated]

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http://serverfault.com – I'm running VirtualBox 4.2.4 on a Windows 7 x64 host. I installed a Xubuntu guest system. The VM has network access through NAT. VirtualBox is configured to act as DHCP server (setup by default) and listens on The IP address of the host on the LAN is, the router is So, after I installed Xubuntu, everything just worked, no problem connecting to the internet. I didn't configure anything. However, I now want to share a folder in the Xubuntu guest and access it from the windows host. But when I look up the IP address of the guest it is I don't (HowTos)