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HowTo Roll Your Own OpenVPN Windows Installation Package

Mathias Sundman (mathias@openvpn.se)
2005-02-17
Rev 1.1

Introduction

The installation package used to install OpenVPN on Windows is created with NSIS (Nullsoft Scriptable Install System), an open source tool. The build process is controlled by a simple text file, a NSIS script. Since the OpenVPN 2.0-rc14 release, the latest version of NSIS (v2.05 at the time of writing) can be used to build the installation package. Privious versions required NSIS 2.0beta3. The installation package used to install OpenVPN GUI is based on the original OpenVPN installation package with OpenVPN GUI and My Certificate Wizard added to it.

Required software

• NSIS v2.05 - The Nullsoft Scriptable Install System
  
  Available from either OpenVPN GUI's homepage:
  http://www.openvpn.se/files/nsis/nsis205.exe
  
  or from the NSIS homepage:
  http://nsis.sourceforge.net/download
  
  
• All files to include in the installation package and referred to by the NSIS script
  
  I've created a ZIP file containing all files required to build the installation package including the actual NSIS script. I intend to create a new zip file for every new stable release of OpenVPN and OpenVPN GUI. I might create zip's for some beta releases also. If the version you wish to use is not available, you can always use the closest matching version of this zip, and then just replace openvpn.exe and/or openvpn-gui.exe.
  
  This package is available here:
  http://www.openvpn.se/files/install_packages_source

Preparations

• Download and install NSIS v2.05.
• Download and extract the installation package source zip file referred to above.

Building the Installation Package

To build the installation package, simply right-click the NSIS script (openvpn-gui.nsi) and chose Compile NSI.

Modifying the script for your own needs

How do I include my own openvpn configuration file?

• Create your own config file and name it as you want the connection named when using the GUI. For example Office.ovpn.
• Put Office.ovpn in the openvpn\config folder.
• Under the OpenVPN GUI section in the NSIS script uncomment the following line:
  
       File "$\config\Office.ovpn"
  
  

How do I include an other version of OpenVPN or OpenVPN GUI than the one included in the ZIP file?

• Replace openvpn.exe and/or openvpn-gui.exe in the openvpn folder with the version you want.
• Put the source code zip-file for the corresponding openvpn and/or openvpn-gui version in the openvpn folder.
In the beginning of the NSIS script modify the following lines to match the versions you use:

     !define OPENVPN_VERSION "2.0_rcXX"
     !define GUI_VERSION "1.0-rcXX"

How do I make the installation package install the TAP driver as "Hidden" per default?

Comment out the following line with a semicolon under the Function .onInit section:

     SectionSetFlags $ 0


How do I make the installation package install My Certificate Wizard per default?

Comment out the following line with a semicolon under the Function .onInit section:

     SectionSetFlags $ 0

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