How do I get the activation key for OpenVPN?

Can I use OpenVPN for free?

Yes.

Since version 2.9, OpenVPN supports a serverless server mode. OpenVPN can automatically connect to VPN servers without requiring the users to manually enter their usernames and passwords. It's free and open source software licensed under the terms of the GNU General Public License (GPL).

OpenVPN on Windows. OpenVPN is not free or open source software when compared to the open-source software it supports and improves. I am a volunteer contributor to OpenVPN for Windows; my personal opinion has no influence on its core features, which have received many improvements in OpenVPN 2.3.

That said, OpenVPN 2.3 does include a "Serverless" version of the software, giving users an option to connect to VPN servers without having to enter their credentials.

OpenVPN is free software released under a special version of the GNU GPL. This allows anyone to use it freely. The only requirement is that you share your improvements and give credit to the original authors. You can read the license at GPL.

This guide was written by William Rastetter. Installing OpenVPN for Windows. The easiest way to install OpenVPN for Windows is by using the default Windows installer provided by the OpenVPN development team. Visit and download the zip file containing the latest release of OpenVPN.

Note: If you want to use the most recent stable release, skip to the Configuring a Serverless VPN Server section. For older releases, the following instructions can help you get OpenVPN installed. Windows XP users will need to manually download the OpenVPN executable. For each version of Windows supported by OpenVPN, we provide a ZIP package containing both a stand-alone version of the executable and a MSI installer package.

All other versions of Windows come with a pre-installed executable that is not a separate download but can be double-clicked to start the installer. For example, if you downloaded the OpenVPN 2.8 distribution for Windows, the executable should already be installed, so double-clicking it will just launch the installer.

We also provide two ZIP packages for other Windows versions. In particular, 32-bit Windows 10 users might find it easier to install OpenVPN from the Windows Store rather than downloading the files separately.

What is the OpenVPN source code license?

I'm trying to work out the OpenVPN source code license.

I have reviewed the license file but I cannot make any sense of it. My problem is that it is only a license and not a copyright assignment agreement.

The text of the license file is at: "OpenVPN is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenVPN. If not, see
My interpretation of this is that OpenVPN can be used in any manner by anyone but the copyright holder is requesting that you keep the GPL license for your code which is GPL v2. This also implies that the copyright holder would own all copyrights to any GPL v2 licensed code (if anyone else ever produces any open source code which uses OpenVPN as the base code).

I'm a little confused about the GPLv2 versus GPLv3. Is it OK to write open source code and use the GPLv2 in the code? Also what do you mean when you say: "This also implies that the copyright holder would own all copyrights to any GPLv2 licensed code (if anyone else ever produces any open source code which uses OpenVPN as the base code)?" Is there anything in the license file where you accept a contract or assignment of rights from the copyright holder? I would imagine that this would be implied from the GPLv2 text, but I cannot find anything like that. I am curious about any comments about the above statements in the license file Thank you for the replies, but the license does not really make sense to me either! Here are my comments:

How do I find my OpenVPN key?

How do I generate it?

How do I install OpenVPN on Windows 10? How do I start the program without having already have a key? This works fine on OpenVPN 2.3, and not at all with OpenVPN 3.
(Please don't answer "why do you need to use v3?", etc. I don't want the OpenVPN 2.3 version).

Also: I'm using a TAP adapter. If you are on openvpn 2.3 you can check your key by executing the openvpn -P command in shell. You will get output of the following form:
Clientrandom 262779122223446680. Serverrandom 262659483401407833. Compression lz4. Certificate /etc/openvpn/keys/user-private.pem secret cb8a4fb6fdd0aaf9ee6fbd4e2d1f07a3b9cc2cf0. Dh1024.pem /etc/openvpn/keys/dh1024.pem
Topology subnet. If you find out what keys are listed, compare them to your config file. I am 99% sure that your key is inside your configuration file, but if it's not, then you'll have to make one manually. There is no other way. There is no 'keytool' option to make them for you.

How do I get the activation key for OpenVPN?

The activation key is an option that you enable in the settings of your app.

The OpenVPN team provides two types of keys.

These keys are used for the Free version of OpenVPN. If you want to use the Advanced version, you will need an OpenVPN account. Click here to sign up.

You need one of these keys if you want your device to be a VPN server. You need a registration key for each client device.

If you don't know how to set up your device as a VPN server, read about how to use this software. If you already have an activated account, then look for Server Keys on your settings page.