Sharing Internet with a BeagleBone Black

A quick tutorial on giving a BeagleBone Black Internet access from a computer.

  • Category: Tutorials
  • Date: August 2014

This is a quick tutorial on how to tether the BeagleBone Black (and other Linux devices) to a Linux computer for Internet connectivity. By default, the BeagleBone Black will take as its IP address when connected to a computer via USB. We need to assign to the USB Ethernet device (enp0s25 in this tutorial) and route all outbound packets to this device from the BeagleBone Black to the Internet via the wireless device (wlp3s0). As root (or using sudo) on the computer,

$ ifconfig enp0s25
$ sysctl net.ipv4.ip_forward=1
$ iptables --table nat --append POSTROUTING --out-interface wlp3s0 -j MASQUERADE
$ iptables --append FORWARD --in-interface enp0s25 -j ACCEPT

As root on the BeagleBone Black,

$ route add default gw
$ echo "nameserver" >> /etc/resolv.conf

This tutorial can also be adapted for tethering other Linux devices to an Internet-connected Linux device, but IP addresses and device names may be different.

Except where otherwise noted, the contents of this post are licensed under Creative Commons Attribution 4.0.

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