Many cellphones provide the option to share their data connection over USB (often called "tethering"). This feature uses one of RNDIS, CDC, or a custom Apple® iPhone®/iPad® protocol.

Before attaching a device, load the appropriate driver into the kernel:

# kldload if_urndis
# kldload if_cdce
# kldload if_ipheth

Once the device is attached ue0 will be available for use like a normal network device. Be sure that the “USB tethering” option is enabled on the device.

To make this change permanent and load the driver as a module at boot time, place the appropriate line of the following in /boot/loader.conf:

if_urndis_load="YES"
if_cdce_load="YES"
if_ipheth_load="YES"