This guide covers connecting Android phones to ClearOS using OpenVPN. This guide is a generalized how to and not a specific howto as Android versions and phone types are diverse as are the many OpenVPN clients. This howto version covers the “OpenVPN for Android” by Arne Schwabe.
Ensure that OpenVPN is installed and running. Also validate that you are allowing port 1194 to come into your server in the Incoming firewall rules.
From a workstation, log in as the user that will be connecting to the OpenVPN at the Webconfig interface using that user's name and password. If you have not already set a password for their certificate, do so now. Download the following to a regular workstation:
Once you have these files, you will need to download them to your Android device. For my test, I copied the files to my user's home directory and used “ES File Explorer” to copy and paste them on my phone in a folder called 'openvpn-certs'.
Once you have the keys, download and install the VPN client. As stated previously, we used “OpenVPN for Android” by Arne Schwabe.
Launch the application and choose 'Add' to add a profile. Give it a name. Navigate to the settings section of that profile. Under 'Basic', enter your server IP address or hostname.
Under 'Type', select User/PW + Certificates.
For the CA Certificate, Client Certificate, and the Client Certificate Key choose the ca-cert.pem, client-username-cert.pem, and client-username-key.pem files respectively.
In the Username field, type the user's name. You may specify the password or for even better security, leave it blank and require it each time the user connects.