Connecting a WiFi network adapter in VirtualBox is impossible because the host's wireless card cannot be passed through to a guest VM. Instead, you must configure the Ubuntu VM to use NAT or Bridged Networking via its virtual Ethernet adapter to access the internet. This workaround ensures stable connectivity without requiring specialized hardware passthrough capabilities.
The Hardware Limitation of WiFi Passthrough
When attempting to add a network adapter in VirtualBox settings for an Ubuntu guest, users often look for a "WiFi" option similar to how they might select a physical USB device. However, VirtualBox does not support passing through the host's internal WiFi radio directly to the guest operating system. The underlying reason is technical: most consumer-grade WiFi adapters do not expose their raw hardware interface to hypervisors due to security restrictions and driver complexity. Consequently, any attempt to manually inject a WiFi driver into the Ubuntu VM will fail because the VM lacks direct access to the physical radio hardware. To resolve this, you must rely on the virtualized Ethernet controllers that VirtualBox provides. These emulated adapters connect to the host's existing network stack, effectively bridging the gap between the isolated VM environment and the real world. The host Windows 10 machine handles the actual WiFi connection, while the Ubuntu VM communicates over a virtual cable. This approach is standard practice for almost all virtualization platforms, including VMware and Hyper-V, ensuring compatibility across different hardware configurations.Configuring NAT for Simple Internet Access
The easiest method to get your Ubuntu VM online is using Network Address Translation (NAT). In this mode, VirtualBox acts as a router for the guest VM, allowing it to share the host's IP address to access external resources. This setup is ideal if you only need outbound internet access for updates, package installations, or browsing, and do not require other devices on your local network to see the VM. To configure NAT, open the VirtualBox Manager and select your Ubuntu VM. Click on Settings, then navigate to the Network tab. Under the Adapter 1 section, ensure that "Enable Network Adapter" is checked. In the "Attached to:" dropdown menu, select NAT. You can leave the advanced settings at their defaults unless you have specific port forwarding requirements. Once applied, start the Ubuntu VM. The virtual machine should automatically obtain an IP address via DHCP from the VirtualBox NAT engine. Verify the connection by opening a terminal in Ubuntu and runningping -c 4 google.com. If you receive replies, your VM has successfully established an internet connection. This method requires no additional configuration on the Windows 10 host side, making it the fastest solution for basic connectivity needs. For more complex networking scenarios where the VM needs to be accessible from other machines on your LAN, consider reviewing Bridged VirtualBox Ethernet Setup Windows 10 Ubuntu for alternative configurations.
Using Bridged Networking for Local Network Visibility
If you need your Ubuntu VM to appear as a distinct device on your local network, such as for hosting a web server or accessing shared drives, Bridged Networking is the appropriate choice. This mode connects the VM directly to the host's network interface, allowing it to receive its own IP address from your home router or corporate DHCP server. Note that while Bridged Networking works seamlessly with wired Ethernet connections, configuring it over WiFi can sometimes be problematic depending on your router's AP isolation settings. To set up Bridged Networking, go back to the Network settings in your VM. Change the "Attached to:" dropdown from NAT to Bridged Adapter. In the "Name:" field, select your Windows 10 WiFi adapter from the list of available interfaces. Ensure that "Promiscuous Mode" is set to "Allow All" if you encounter filtering issues, though this is rarely necessary for standard setups. Apply the changes and restart the network interface within Ubuntu, or simply reboot the VM. Once the VM starts, it should request an IP address from your main router just like any other computer on your WiFi. Check the assigned IP usingip addr show in the Ubuntu terminal. It should match the subnet of your host machine (e.g., 192.168.1.x). This configuration allows bidirectional communication between the VM and other devices on your network, providing a more integrated experience than NAT.