Category Archives: OpenVPN

Group Policy Software Deployment OpenVPN

You will require:

OpenVPN Code signing certificate: http://anonit.blogspot.com.au/2016/03/extract-openvpn-driver-code-signing.html
OpenVPN MSI – instructions here:

Create the deployent share, and set permissions as appropriate: http://anonit.blogspot.com.au/2016/03/group-policy-software-deployment.html

Place the OpenVPN MSI into the deployment share.

Open GPMC.MSC


Expand the domain, and expand Group Policy Objects.  Right click and select New


Give the software deployment a name, and click OK


Right click the GPO and select Edit…


Expand Computer Configuration –> Policies –> Software Settings  Right click on
Software Installation and select New –> Package…


Navigate to the deployment share via UNC, select the MSI, and click Open.


Select Assigned and click OK.


The application is now assigned for install.


Navigate to Computer Configuration –> Windows Settings –> Security Settings –> 
Public Key Policies.  Right click Trusted Publisher and select Import…



Click Next



Click Browse


Navigate to the OpenVPN certificate and click Open


Click Next



Click Next


Click Finish


Click OK



The certificate is now ready to be pushed out via Group Policy.


Drag the Group Policy Object (EG: Install Open VPN Client) and release on the OU you wish to
deploy the software to.  (EG: Corp Computers).


The software will now be deployed to computer objects in that OU.

Extract OpenVPN driver code signing certificate

To extract the OpenVPN driver code signing certificate, download OpenVPN from here: https://openvpn.net/index.php/download/community-downloads.html (this article was created using version 2.3.10)

On a test machine, install as administrator.


Click Next


Click I Agree


Ensure that only TAP Virtual Ethernet Adapter is selected and click Next


Click Install


On the windows security dialog, tick Always trust software from “OpenVPN Technologies, Inc.”.
and click Install.


Once installed, click Next


Click Finish


Open the MMC



Click File and select Add/Remove Snap-in…


Select Certificates and click Add.


Select Computer Account and click Next



Select Local comptuer: (the computer this console is running on) and click Finish


Click OK


Expand Certificates (Local Computer) –> Trusted Publishers –> Certificates.

Right click the OpenVPN Technologies certificate and select All Tasks –> Export…


Click Next



Select Base64 encoded x.509 (.CER) and click Next



Click Browse, navigate to the location you wish to save the certificate and click Next


Click Finish


Click OK


The certificate is now in the location specified.

OpenVPN – Creating an MSI installer

To create an MSI installer for open VPN will require:

WIX: http://wixtoolset.org/releases/ (This was created using 3.10.2)

Open VPN installer: https://openvpn.net/index.php/download/community-downloads.html (This was created using 2.3.10)

2 x GUID: http://www.guidgen.com/

Createmsi.bat: http://pastebin.com/gbT4b2wC

Openvpn-install-2.3.10-i602-x86_64.wxs: http://pastebin.com/yTYWaT13

Download WIX from the link above.

Install by running as administrator.

Install.


Create a folder in the root of C drive called OpenVPN.


Modify Openvpn-install-2.3.10-i602-x86_64.wxs.  Change the following:

<?define ProductVersion = “2.3.10“?>

<?define ExeSourceFile = “openvpn-install-2.3.10-I602-x86_64.exe“?> 

<?define ProductCode = “9dc4937b-e23c-42a3-a344-86b78f61f8d1“?>

<?define ProductUpgradeCode = “407cfa7d-b3fc-48a9-abfc-2088070685a7“?>

ProductVersion is the version of Open VPN to install.

ExeSourceFile is the name of the Open VPN executable file.

ProductCode is one of the GUID you generated.

ProductUpgradeCode is the 2nd GUID generated.

The wxs file name will need to be changed to reflect the exe installer name.


The GUID are used to identify the products.  The ProductCode is the ID of the version we are
installing now.  The product upgrade code will allow upgrading of previous versions to the current version.  In the example ablove, I will install a product code of 9dc4937b-xxx.  This will update
product code of 407cfa7d-xxx.  When i create the next version, I will generate a new GUID and use that for the product code, but place the 9dc4937b-xxx into the product update code.

Place CreateMSI.bat andOpenvpn-install-2.3.10-i602-x86_64.wxs into the c:openvpn folder.


Open an administrator command prompt.


Navigate to c:openvpn and run CreateMSI.bat.


This will create the MSI in the c:openvpn folder.