---
title: "Set Up OpenVPN on Linux with NetworkManager or CLI"
url: "https://astraguardvpn.com/blog/set-up-openvpn-on-linux-with-networkmanager-or-cli"
description: "Learn how to configure OpenVPN on Linux using NetworkManager or CLI. Includes step-by-step guide and troubleshooting tips."
updated: "2026-07-17T09:00:13.527Z"
---

# Set Up OpenVPN on Linux with NetworkManager or CLI

Learn to set up OpenVPN on Linux using NetworkManager or CLI with detailed examples and technical insights.

Before You Start Setting up OpenVPN on Linux involves configuring networking components and understanding VPN protocols. Ensure you have administrative access on your Linux machine and a stable internet connection. Familiarize yourself with basic command-line operations as you will interact with the terminal. Back up existing configurations to avoid data loss. Technical Background OpenVPN is an open-source Virtual Private Network (VPN) solution that uses the OpenSSL library to provide secure point-to-point or site-to-site connections. It implements OSI layer 2 or 3 secure network extension using the SSL/TLS protocol. OpenVPN's flexibility allows it to traverse NAT and firewalls, making it a robust solution for secure communications. The core operation of OpenVPN involves establishing an encrypted tunnel between the client and the server. This tunnel is secured using SSL/TLS for key exchange and encrypted data transfer. Configuration files on both client and server sides determine the behavior of the VPN, including IP address assignment and routing rules. OpenVPN uses configuration files (.ovpn) that define connection settings such as server address, port, and authentication methods. These files are loaded by the OpenVPN software to initiate and manage VPN connections. Step By Step 1. Install OpenVPN: Use your package manager to install OpenVPN. On Debian-based systems, run: bash sudo apt-get update sudo apt-get install openvpn 2. Obtain Configuration Files: Acquire the .ovpn configuration file from your VPN service provider. 3. Install NetworkManager Plugin (Linux): If you wish to manage VPN through a GUI, install the NetworkManager plugin: bash sudo apt-get install network-manager-openvpn-gnome 4. Configure OpenVPN with NetworkManager: - Open NetworkManager from your system settings. - Select 'VPN' and click 'Add' to create a new VPN connection. - Select 'Import from file...' and choose your .ovpn file. - Enter credentials if prompted and save the configuration. 5. Configure OpenVPN via CLI: - Place your .ovpn file in /etc/openvpn/client. - Start OpenVPN with: bash sudo openvpn --config /etc/openvpn/client/YOUR_CONFIG.ovpn - Verify the connection through the terminal output. Worked Example Example: OpenVPN CLI Configuration Place your server.ovpn file in /etc/openvpn/client/. Command: sudo openvpn --config /etc/openvpn/client/server.ovpn Expected output should show "Initialization Sequence Completed" indicating a successful connection. Configuration Or Command Reference - remote 10.8.0.2 1194 udp — VPN server endpoint and protocol. - dev tun — Create a TUN device for routing. - ca ca.crt — Certificate authority file for validation. - auth-user-pass — Prompt for username and password. - cipher AES-256-CBC — Encryption algorithm used. Troubleshooting Symptom: Connection Timeout Likely Cause: Incorrect server address or port. Fix: Verify the server IP and port in the .ovpn file. Symptom: Authentication Failure Likely Cause: Incorrect credentials. Fix: Re-enter username and password; check with VPN provider. Symptom: Network Inaccessible Post-Connection Likely Cause: IP conflict or routing issue. Fix: Check IP settings and routing table. Related Concepts And Further Reading - SSL/TLS Protocol - Network Address Translation (NAT) - TUN/TAP Interfaces - OpenSSL Library - VPN Routing and Security Key Takeaways • OpenVPN provides secure VPN connections using SSL/TLS. • Configuration files (.ovpn) are crucial for setting OpenVPN behavior. • NetworkManager offers a GUI for VPN configuration on Linux. • CLI offers flexibility and control over VPN connections. • Troubleshooting involves checking server details, credentials, and network settings. FAQ Q: What is OpenVPN? A: OpenVPN is an open-source VPN solution that uses SSL/TLS for secure connections. Q: How do I verify my OpenVPN connection? A: Check terminal output for "Initialization Sequence Completed" for successful setup. Q: Can I use OpenVPN on other platforms? A: Yes, OpenVPN is available for Windows, macOS, Android, and iOS as well.

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