Installing OpenVPN on Ubuntu 24.04 with Easy-RSA
Step-by-step guide to installing OpenVPN 2.6.12 on Ubuntu 24.04 and configuring Easy-RSA to generate security certificates for secure VPN connections.
Stock photo for illustration only, not from the actual event
- Install OpenVPN version 2.6.12 on Ubuntu 24.04 directly from the default package repositories.
- Utilize the Easy-RSA certificate management tool to generate digital certificates and TLS encryption files.
- Initialize a Public Key Infrastructure (PKI) and build a Certificate Authority for the VPN server.
OpenVPN is an open-source, full-featured VPN solution that enables secure site-to-site and point-to-point connections. It creates encrypted tunnels using TLS (Transport Layer Security) to secure data transmission over untrusted networks such as the Internet between clients and servers. It supports multiple encryption algorithms, including AES-256, to protect network communication from man-in-the-middle and eavesdropping attacks. This guide walks through installing OpenVPN on Ubuntu 24.04 and configuring it to create secure end-to-end encrypted connections between the VPN server and client devices.
Before you begin, you need access to an Ubuntu 24.04 server as a non-root user with sudo privileges. OpenVPN is available in the default package repositories on Ubuntu 24.04, and you can install it using the following commands:
- Update package lists: sudo apt update
- Install OpenVPN package: sudo apt install openvpn -y
- Verify the installed version: openvpn --version which outputs OpenVPN 2.6.12 alongside OpenSSL 3.0.13
Stock photo for illustration only, not from the actual event
The next major phase involves creating the OpenVPN server private key, certificate, and TLS encryption files. OpenVPN requires a server certificate, private key, and encryption files signed by a trusted certificate authority (CA) to enable VPN tunnel connections. Easy-RSA serves as the certificate authority management tool for this purpose. You can install it using sudo apt install easy-rsa -y, navigate to your user home directory, create an easy-rsa folder, and link the necessary script files from the system repository.
Integrating Easy-RSA with OpenVPN is a foundational best practice for establishing a robust Public Key Infrastructure (PKI). Configuring the vars file with Elliptic Curve Cryptography (ec) and SHA-512 digest algorithms significantly enhances the cryptographic strength of your digital certificates. This approach ensures enterprise-grade security for administrators deploying virtual private networks on modern Linux distributions like Ubuntu 24.04.
After configuring the vars parameters with your organization details, initialize the PKI environment using the ./easyrsa init-pki command. Proceed to build the certificate authority using ./easyrsa build-ca to generate the root public certificate and private key pair. Following this, generate the server certificate request with gen-req, sign the request using sign-req server, and generate the ta.key HMAC signature file to enable TLS verification on the server.
Source: Dev.to
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