Use OpenVPN on Galaxy Nexus

I recently got a Galaxy Nexus to play with. What I hate is Android doesn't provide native proxy support, or OpenVPN support, because I'm in China.

First step: Root the device

I followed the instruction on GalaxyNexusRoot.com.

Next: Install openvpn

  • Install OpenVPN Installer on Android Market. Run the application and install openvpn and ifconfig and route to /system/xbin.

  • This step is important: making ifconfig and route in /system/xbin/bb, because openvpn will execute /system/xbin/bb/ifconfig to create tun0 interface, otherwise, the device will connect to the server without an interface to send packets.

    • Install SSHDroid on Android Market. SSH to the device and run

      mkdir /system/xbin/bb
      ln -s /system/xbin/ifconfig /system/xbin/bb/
      ln -s /system/xbin/route /system/xbin/bb/
      
    • If it says "Read-only file system". Run the following command first to make it read/write, and then run the above commands.

      mount -o remount,rw -t ext4 /dev/block/platform/omap/omap_hsmmc.0/by-name/system /system
      

      Update: a simplified version

      mount -o remount,rw /system
      
    • Later, you can choose to make to readonly again by

      mount -o remount,ro -t ext4 /dev/block/platform/omap/omap_hsmmc.0/by-name/system /system
      

      Update: A simplified version:

      mount -o remount,ro /system
      

Run it

Now it'll be fine to run OpenVPN by OpenVPN Settings. Just copy OpenVPN configuration files into /mnt/sdcard/openvpn and run it in OpenVPN Settings.

The problem I met

Update: OpenVPN Installer 0.2.4 fixed the problem by providing the option with openvpn using /system/xbin/ifconfig and /system/xbin/route

At the beginning, I tried to connect using OpenVPN Settings but failed, but from logs by adb mixed with system logs, I couldn't find useful information. I didn't find the tun.ko on the device, and I searched and viewed a ton of pages and found nothing.

Though from TUN.ko Installer I saw Tun module is loaded, and Path to tun.ko is not found!, I thought there was some problem with the software that showing inconsistent information. I gave a last try to DroidVPN, and I succeeded to connect!

Before that, I even downloaded the source and was ready to compile tun.ko myself. The lesson is to try every possible way, a problem can be caused by any possible reason.

Published: January 05 2012

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