How to Install OpenVPN on Ubuntu: A Complete Guide

When you're browsing the web, especially across untrusted networks like public Wi-Fi, the risk of exposing your personal data is all too real. Thankfully, tools like OpenVPN are here to provide a secure and private connection. In this detailed guide, we’ll walk you through how to install OpenVPN on an Ubuntu 18.04 server, ensuring your data remains safe while you navigate the web.

What is OpenVPN?

OpenVPN is an open-source software that creates secure and private connections over untrusted networks. Essentially, it acts as a virtual private network (VPN) that encrypts your internet traffic and routes it through a remote server, making it nearly impossible for anyone to monitor your online activities.

Why would you want this? Because online privacy and security matter. Whether you’re accessing sensitive work files, banking online, or simply browsing, OpenVPN ensures no one can peek into your internet traffic.

Why Install OpenVPN on Ubuntu Server?

Ubuntu is one of the most popular Linux distributions, and it’s ideal for hosting servers. Installing OpenVPN on your Ubuntu server is one of the best ways to protect your data and ensure a safe online experience. Here’s why you should consider installing OpenVPN:

1. Increased Security

With OpenVPN, your data is encrypted. This means that no one can access or monitor your internet traffic. The encryption protocols it uses ensure that your browsing remains private.

2. Cost-Effective Solution

Unlike many commercial VPN services, OpenVPN is free. You don't need to pay for licenses or subscriptions, making it a great option for those looking to secure their networks without breaking the bank.

3. Flexibility and Control

OpenVPN offers incredible flexibility. You can set up your VPN to connect to your home network, corporate network, or even set up a private server for personal use, wherever you are.

Prerequisites Before Installing OpenVPN

Before we jump into the installation process, there are a few things you’ll need:

A Ubuntu 18.04 server (the steps apply to other versions as well)
SSH access to your server
Root or sudo privileges to install packages

How to Install OpenVPN on Ubuntu

Let’s get down to business! Here’s a step-by-step guide to installing OpenVPN on your Ubuntu server.

Step 1: Update Your Server’s Package Index

Before installing any new software, it’s always a good idea to update your server’s package index. This ensures that your server is running the latest versions of packages available.

bash

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sudo apt update

Step 2: Install OpenVPN and OpenSSL Libraries

Now, let’s install OpenVPN and its dependencies. OpenVPN needs OpenSSL for encryption and secure communications.

Run the following command:

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sudo apt-get install openvpn

Once the installation is complete, you’ll need to extract the OpenVPN files from the archive:

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tar -xzvf openvpn-2.3.2.tar.gz

After extraction, navigate to the OpenVPN directory:

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cd OpenVPN-2.3.2/

Step 3: Generate Configuration Files

Before setting up OpenVPN, you need to generate a static key to authenticate TLS/SSL connections. To do this, run the following command:

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sudo openvpn --genkey --secret keys/ta.key

This will create a file called ta.key, which will be used for the secure communication between your server and clients.

Configuring Your Server’s Firewall

The firewall rules need to be configured so that traffic can flow correctly through the VPN. We’ll use UFW (Uncomplicated Firewall) to handle this.

Step 1: Install UFW (If Not Installed)

Run this command to install UFW if it’s not already set up:

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sudo apt-get install ufw

Step 2: Allow OpenVPN Traffic

Now, you need to allow OpenVPN traffic through the firewall. This can be done with the following commands:

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sudo ufw allow 1194/udp

sudo ufw enable

Step 3: Start the OpenVPN Service

With the firewall configured, you’re now ready to start the OpenVPN service. Use this command to start the server:

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sudo systemctl start openvpn@server

To check the status of the server, run:

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sudo systemctl status openvpn@server

How to Connect to OpenVPN Remotely

Once OpenVPN is installed and running, you can connect to it remotely. There are two ways to do this: through the OpenVPN client or via a web browser.

Connecting via OpenVPN Client

To connect using the OpenVPN client, you’ll first need to download and install it on your device. After installing, launch the application and enter your server’s address, followed by your username and password.

Once you’re connected, you should be able to access the files on your server and transfer them as needed.

Testing the Client

To ensure everything works, run this command to test the connection:

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openvpn --remove SERVER_IP --dev tun1 --ifconfig 10.9.8.2 10.9.8.1

Generating a Static Key for Secure Transfers

Before transferring files, you need to generate a static key. Run this command on your server to generate it:

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openvpn --genkey --secret static.key

Securely transfer this file to your client system, using methods like scp (Secure Copy).

Tips for Optimizing OpenVPN Server Configurations

To get the best performance and security from your OpenVPN setup, consider these optimization tips:

1. Use a Strong Cipher Suite

Always opt for a strong cipher suite, like AES-256-GCM, to ensure your data is encrypted securely.

2. Enable Compression

Using compression methods like LZO or ZLIB can reduce bandwidth usage, making your VPN more cost-effective and faster.

3. Deploy Multiple Servers

If you’re managing a larger network, consider using multiple OpenVPN servers. This enhances redundancy and ensures better performance.

4. Automate with Scripts

Managing multiple servers can be complex. Using scripts like ovpn-init can automate configuration management and reduce human error.

Conclusion

Installing OpenVPN on your Ubuntu server is a great way to secure your data and online activities. With the right setup, you can confidently access your files and networks without worrying about data theft or privacy breaches.

As always, after setting up OpenVPN, take the time to fine-tune your configurations for optimal security and performance.

FAQs

1. Is OpenVPN secure?

Yes, OpenVPN uses robust encryption standards like HTTPS SSL, making it highly secure for online communications.

2. Does Ubuntu have a built-in VPN?

No, Ubuntu doesn’t have a built-in VPN. However, it offers a network manager that can help you configure VPN connections, such as OpenVPN.

3. Which OpenVPN provider is best for Ubuntu?

Providers like CyberGhost, NordVPN, and ExpressVPN are known to work well with Ubuntu systems.

4. Can I use OpenVPN on a Windows server?

Yes, OpenVPN can be installed on a Windows server. The installation process is similar, though there are differences in the steps.

5. What’s the difference between OpenVPN and other VPN services?

OpenVPN is open-source and free, offering full control over the VPN setup. Other services might be easier to use but may come with subscription fees.

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