Mer/Documentation/USB Networking

2009-04-13T13:36:57Z

86.208.161.71: /* find your DNS */

This is a method to use your PC internet connection on your tablet.

This was tried with an N810 with an Ubuntu laptop.

== Preparation ==

on host: open (with root privileges) file <code>/etc/network/interfaces</code>

add the following at the end of the lines:

<pre>auto usb0
iface usb0 inet static
address 192.168.2.1
netmask 255.255.255.0
broadcast 192.168.2.255
up echo 1 > /proc/sys/net/ipv4/ip_forward
up iptables -P FORWARD ACCEPT
up iptables -A POSTROUTING -t nat -j MASQUERADE -s 192.168.2.0/24
down echo 0 > /proc/sys/net/ipv4/ip_forward
down iptables -t nat -F POSTROUTING</pre>

== Enter rescue mode ==

Put your tablet on. As soon as the "Nokia" screen appears, press the "home" button of your tablet, the one that is just under the camera, and keep it pressed until the "Mer" screen appears.

Shortly after this screen appeared, the rescue mode will appear. It gives you five choices: 
- start Mer; 
- activate console; 
- act as an ethernet USB gadget; 
- act as a serial USB tool; 
- reboot. 

Select the option that says "act as an ethernet USB gadget".

A console screen will scroll, then the Mer screen will appear.

Connect the USB cable between your PC and the Tablet.

== configure your network interface ==

On host: open a shell, and type

<pre>modprobe usbnet</pre>

then

<pre>sudo ifdown usb0</pre>

then

<pre>sudo ifup usb0</pre>

You should get no message from the shell.

== find your DNS ==

(on host) In Ubuntu, they should be in

<code>/etc/resolv.conf</code>

On the Tablet: open the shell, and type

<pre>sudo echo nameserver A.B.C.D > /etc/resolv.conf</pre>

[where A.B.C.D represent the figures in your DNS. For instance 208.67.222.222 (public nameserver)].

== test by pinging ==

on host: open a shell, and type

<pre>ping 192.168.2.2 -c 5</pre>

It should return five lines proving that contact was established with the Tablet.

This means that you are ready to use the internet connection of your computer.

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Mer/Documentation/USB Networking