Xen network device frontend driver

modulename: xen-netfront.ko

configname: CONFIG_XEN_NETDEV_FRONTEND

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Xen network device frontend driver
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
The network device frontend driver allows the kernel to
access network devices exported exported by a virtual
machine containing a physical network device driver. The
frontend driver is intended for unprivileged guest domains;
if you are compiling a kernel for a Xen guest, you almost
certainly want to enable this.

source code: