In this tutorial, we will show you how to install OpenVPN Server on Ubuntu 20.04 LTS. For those of you who didn’t know, OpenVPN is a robust and highly flexible open-source VPN software that uses all of the encryption, authentication, and certification features of the OpenSSL library to securely tunnel IP networks over a single UDP or TCP port.
This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘
sudo‘ to the commands to get root privileges. I will show you through the step-by-step installation of OpenVPN on a Ubuntu 20.04 (Focal Fossa) server.
Install OpenVPN Server on Ubuntu 20.04 LTS Focal Fossa
Step 1. First, make sure that all your system packages are up-to-date by running the following
apt commands in the terminal.
sudo apt update sudo apt upgrade
Step 2. Installing OpenVPN on Ubuntu 20.04.
Clone the OpenVPN-install repository, thus the installation is as simple as running the command below:
wget https://git.io/vpn -O openvpn-install.sh && bash openvpn-install.sh
You will get a couple of prompts to change or confirm default settings for the installation:
Welcome to this OpenVPN "road warrior" installer! I need to ask you a few questions before starting the setup. You can leave the default options and just press enter if you are ok with them. First, provide the IPv4 address of the network interface you want OpenVPN listening to. IP address: 192.168.77.21 Which protocol do you want for OpenVPN connections? 1) UDP (recommended) 2) TCP Protocol [1-2]: 1 What port do you want OpenVPN listening to? Port: 1194 Which DNS do you want to use with the VPN? 1) Current system resolvers 2) 184.108.40.206 3) Google 4) OpenDNS 5) Verisign DNS [1-5]: 1 Finally, tell me your name for the client certificate. Please, use one word only, no special characters. Client name: client Okay, that was all I needed. We are ready to set up your OpenVPN server now. Press any key to continue...
Main OpenVPN server configuration file is,
/etc/openvpn/server.conf you are free to tune and tweak it to your liking:
$ cat /etc/openvpn/server.conf port 1194 proto udp dev tun sndbuf 0 rcvbuf 0 ca ca.crt cert server.crt key server.key dh dh.pem auth SHA512 tls-auth ta.key 0 topology subnet server 10.8.0.0 255.255.255.0 ifconfig-pool-persist ipp.txt push "redirect-gateway def1 bypass-dhcp" push "dhcp-option DNS 220.127.116.11" push "dhcp-option DNS 18.104.22.168" keepalive 10 120 cipher AES-256-CBC comp-lzo user nobody group nogroup persist-key persist-tun status openvpn-status.log verb 3 crl-verify crl.pem
Step 3. Generate OpenVPN user profile (.ovpn file)
We need to generate VPN Profiles to be used by the users. The same script we used for the installation will be used for this:
$ ./openvpn-install.sh Looks like OpenVPN is already installed. What do you want to do? 1) Add a new user 2) Revoke an existing user 3) Remove OpenVPN 4) Exit Select an option [1-4]: 1 Tell me a name for the client certificate. Please, use one word only, no special characters. Client name: meilana.maria Generating a 2048 bit RSA private key ...+++ .............................................................................................................................+++ writing new private key to '/etc/openvpn/easy-rsa/pki/private/meilana.maria.key.8dsBMWTWPe' ----- Using configuration from ./openssl-easyrsa.cnf Check that the request matches the signature Signature ok The Subject's Distinguished Name is as follows commonName :ASN.1 12:'meilana.maria' Certificate is to be certified until May 4 16:16:32 2028 GMT (3650 days) Write out database with 1 new entries Data Base Updated Client josphat.mutai added, configuration is available at: /root/meilana.maria.ovpn
Step 4. Connect to OpenVPN Server from the client.
You can use the VPN client of your choice to configure the OpenVPN client on your operating system. For those who want to use the Official OpenVPN client, go to the downloads page.
Congratulations! You have successfully installed OpenVPN. Thanks for using this tutorial for installing the OpenVPN server in Ubuntu 20.04 LTS (Focal Fossa) system. For additional help or useful information, we recommend you check the official OpenVPN website.