BeagleBone Internet over USB only

Sure, the BeagleBone and BeagleBone Black come with an ethernet port on them, but why have to get another cable out? You might not even be anywhere near the router. The BeagleBone images automatically do network communcations over USB, as shown by how you can go to from your browser to see the BeagleBone start page and to use the Cloud9 editor hosted on the BeagleBone. The problem is that the host computers do not usually relay network traffic to new interfaces. I don't know why not. It would be nice if you could just connect stuff to any connection and it'd always work, but it's not hard to set up NAT and such once you know how to do it. The connection over USB might be slighlty slower than the dedicated connection, since USB is slower and is sharing the connection with things JTAG communication and mass storage. For all I know, though, the ethernet on the BeagleBone is actually controlled by the same USB controller, so it might not be at all different!

On the BeagleBone

ifconfig usb0
route add default gw

On Linux computer:

sudo su
#eth0 is my internet facing interface, eth3 is the BeagleBone USB connection
ifconfig eth3
iptables --table nat --append POSTROUTING --out-interface eth0 -j MASQUERADE iptables --append FORWARD --in-interface eth3 -j ACCEPT echo 1 > /proc/sys/net/ipv4/ip_forward

On a Windows computer, I would think you could use the graphical Internet Connection Sharing feature.