Install OpenVPN Client on Nexus S

Steps below is how I setup OpenVPN client on my Nexus S to connect to the OpenVPN server on my Synology NAS DS207+.

1. Root the phone first.
2. Go to market and download busybox . Install busybox to /system/xbin.
3. Go to market and download ES File Explorer. Using ES file explorer and mount root / as writable.
4. Go to market and download sshdroid.
5. Download putty and ssh to android (user root, password admin), executes the comment below
   

   # busybox mkdir /system/xbin/bb
# ln -s /system/xbin/busybox /system/xbin/bb/ifconfig
# ln -s /system/xbin/busybox /system/xbin/bb/route


6. Download tun.ko and copy to android /system/modules
7. Go to market again and download openvpn installer and openvpn settings
8. Open OpenVPN Installer and click ‘Install’ button.

   .

   Click Install again to confirm installation.

   

   Choose ‘/system/xbin’.

   

   Keep clicking allow button to continue.

   

9. Open OpenVPN Settings, click Menu/Advanced

   - Click ‘Load tun kernel module’
   - Input ‘/sdcard/openvpn’ as path to configurations
   - Input ‘/system/xbin/openvpn’ as path to openvpn binary

   

   - Click ‘TUN module settings’, in ‘Load module using’, select ‘insmod’ and input ‘/system/modules/tun.ko’ as ‘path to tun module’.

   

10. Connect your phone with the usb cable, create a ‘openvpn’ directory to the sdcard root. Copy the OpenVPN client config file i.e. client.ovpn, ca.crt, client.crt, client.key, ta.key to the /sdcard/openvpn directory.
11. Back to OpenVPN Setting, click OpenVPN to turn on OpenVPN. Long click the OpenVPN client config and then click Preferences from the popup menu.

    

12. Select ‘Built-in + Scripts (passwords)’ for Script Security Level.