Mer/Documentation/USB Networking
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This is a method to use your PC internet connection on your tablet.
This is a method to use your PC internet connection on your tablet.
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== Preparation ==  
== Preparation ==  
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on host: open (with root privileges) file <code>/etc/network/interfaces</code>
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On host, open (with root privileges) file <code>/etc/network/interfaces</code> and add the following at the end of the lines:
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add the following at the end of the lines:
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<pre>auto usb0
<pre>auto usb0
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       down echo 0 > /proc/sys/net/ipv4/ip_forward
       down echo 0 > /proc/sys/net/ipv4/ip_forward
       down iptables -t nat -F POSTROUTING</pre>
       down iptables -t nat -F POSTROUTING</pre>
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(in Mer 0.15testing9, the address line above should be <code>address 192.168.2.14</code> as Mer is hardcoded to use that as a gateway address)
== Enter rescue mode ==  
== Enter rescue mode ==  
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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.
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Turn your tablet on. As soon as the Nokia screen appears, press the Home button on your tablet and keep it pressed until the Mer screen appears.
Shortly after this screen appeared, the rescue mode will appear. It gives you five choices:<br />
Shortly after this screen appeared, the rescue mode will appear. It gives you five choices:<br />
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- start Mer;<br />
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* Start Mer
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- activate console;<br />
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* Activate console
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- act as an ethernet USB gadget;<br />
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* Act as an ethernet USB gadget
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- act as a serial USB tool;<br />
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* Act as a serial USB tool
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- reboot.<br />
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* Reboot
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Select the option that says "act as an ethernet USB gadget".
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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.
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A console screen will scroll, then the Mer screen will appear.
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== Configure your network interface ==
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Connect the USB cable between your PC and the Tablet.
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On host, open a shell, and type:
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== configure your network interface ==
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<pre>modprobe usbnet
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sudo ifdown usb0
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On host: open a shell, and type
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sudo ifup usb0</pre>
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<pre>modprobe usbnet</pre>
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then
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<pre>sudo ifdown usb0</pre>
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then
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<pre>sudo ifup usb0</pre>
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You should get no message from the shell.
You should get no message from the shell.
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== find your DNS ==  
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== Find your DNS ==  
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(on host) In Ubuntu, they should be in
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<code>/etc/resolv.conf</code>
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On host, on Ubuntu, they should be in <code>/etc/resolv.conf</code>.
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On the Tablet: open the shell, and type
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On the tablet, open the shell, and type
<pre>sudo echo nameserver A.B.C.D > /etc/resolv.conf</pre>
<pre>sudo echo nameserver A.B.C.D > /etc/resolv.conf</pre>
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[where A.B.C.D represent the figures in your DNS].
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Where A.B.C.D represent the figures in your DNS. For instance 208.67.222.222 (public nameserver).
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== test by pinging ==
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== Test by pinging ==
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on host: open a shell, and type
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On host, open a shell, and type
<pre>ping 192.168.2.2 -c 5</pre>
<pre>ping 192.168.2.2 -c 5</pre>
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It should return five lines proving that contact was established with the Tablet.
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(in Mer 0.15testing9, the address line above should be <code>address 192.168.2.15</code> as Mer is hardcoded to use that as a device address)
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This means that you are ready to use the internet connection of your computer.
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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.

Latest revision as of 09:41, 22 September 2010

Image:Mer infobox icon.png
 Mer is back : Please visit http://www.merproject.org to learn more about this news.


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

This was tried with an N810 with an Ubuntu laptop.

Contents

[edit] Preparation

On host, open (with root privileges) file /etc/network/interfaces and add the following at the end of the lines: 

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


(in Mer 0.15testing9, the address line above should be address 192.168.2.14 as Mer is hardcoded to use that as a gateway address)

[edit] Enter rescue mode

Turn your tablet on. As soon as the Nokia screen appears, press the Home button on your tablet 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.

[edit] Configure your network interface

On host, open a shell, and type: 

modprobe usbnet
sudo ifdown usb0
sudo ifup usb0

You should get no message from the shell.

[edit] Find your DNS

On host, on Ubuntu, they should be in /etc/resolv.conf.

On the tablet, open the shell, and type 

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

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

[edit] Test by pinging

On host, open a shell, and type 

ping 192.168.2.2 -c 5

(in Mer 0.15testing9, the address line above should be address 192.168.2.15 as Mer is hardcoded to use that as a device address)

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.

Retrieved from "http://bugs.maemo.org/Mer/Documentation/USB_Networking"