Configure of clients

First of all, these keys and certificates should be copied to client device:

• ca.crt
• CLIENT_NAME.crt
• CLIENT_NAME.key
• ta.key

Linux

Install OpenVPN (Arch Linux):

pacman -S openvpn

Install OpenVPN (CentOS 7):

yum -y install openvpn

There are several ways to connect to VPN.

OpenVPN client as service

Create directory to store of client keys

cd <path to directory with client's keys>
mkdir /etc/openvpn/client
cp  ca.crt CLIENT_NAME.crt CLIENT_NAME.key ta.key /etc/openvpn/client

Create client config file for service

cd /etc/openvpn
touch client.conf

Content of client.conf

client
#
dev tun
proto udp
#
remote MyOpenVPNServer.com 1194
#
resolv-retry infinite
user nobody
group nobody
#
persist-key
persist-tun
#
ca /etc/openvpn/client/ca.crt
cert /etc/openvpn/client/CLIENT_NAME.crt
key /etc/openvpn/client/CLIENT_NAME.key
#
remote-cert-tls server
#
tls-auth /etc/openvpn/client/ta.key 1
#
cipher AES-256-CBC
#
comp-lzo adaptive

Start OpenVPN client

systemctl start openvpn@client

Using NetworkManager

Install OpenVPN plugin for NetworkManager (Arch Linux)

pacman -S networkmanager-openvpn

Install OpenVPN plugin for NetworkManager (CentOS 7)

yum -y install NetworkManager-openvpn

Copy keys/certificates and create config file us was describe above.

1. Open NetworkManager -> VPN connections -> Configure VPN;
2. Window “Network connection” -> Add -> Click on “Import VPN …” -> choose client.conf ;

Android

Install OpenVPN using Google Play or F-Droid

It is OpenSource project, code is able to load from GitHub.

1. Copy keys/certificates to some directory;
2. Create config file us was describe above.

Other way

1. Copy keys/certificates to some directory on device;
2. Create new OpenVPN connection;
3. Fill all necessary fields on all tabs.

Windows

click.