How to Install OpenVPN on a VPS Running AlmaLinux 9

In this tutorial, we'll go through the process of installing NYR OpenVPN on a VPS running AlmaLinux 9. OpenVPN is a popular open-source VPN software that allows for secure point-to-point or site-to-site connections in routed or bridged configurations. NYR's installation script automates the whole process, making it easier to get your VPN up and running.

Prerequisites

• A VPS running AlmaLinux 9.
• Root or sudo access to your server.
• Basic knowledge of using the command line.

Step 1: Update Your System

Before you begin, it’s important to make sure your system is up-to-date. Connect to your VPS via SSH and run:

sudo dnf update -y

This command updates all the installed packages to the latest available versions.

Step 2: Install Required Packages

Ensure you have wget and curl installed, as they will be required to download scripts and packages. You can install these with:

sudo dnf install wget curl -y

Step 3: Download the NYR OpenVPN Installation Script

Next, download the NYR OpenVPN installation script with the following command:

wget https://raw.githubusercontent.com/Nyr/openvpn-install/master/openvpn-install.sh

Once the script is downloaded, make it executable:

chmod +x openvpn-install.sh

Step 4: Run the Installation Script

To start the installation, run the script with:

sudo ./openvpn-install.sh

During the execution of the script, you will be prompted with several questions. Follow the prompts to configure your OpenVPN installation:

1. Choose a protocol: You can select between UDP or TCP (choose good defaults according to your needs).
2. Choose a port: Default is 1194 but you can change it if necessary.
3. Choose DNS: Select your preferred DNS provider.
4. Set up client: Choose a name for the client which will connect to the VPN.

Step 5: Adjust Firewall Settings

Once the installation is complete, you may need to adjust the firewall to allow traffic through the OpenVPN port. If you are using firewalld, run:

sudo firewall-cmd --add-port=YOUR_PORT_NUMBER/udp --permanent
sudo firewall-cmd --reload

Replace YOUR_PORT_NUMBER with the port number that you chose during the installation.

Step 6: Configure SELinux (Optional)

If SELinux is enforcing, you might need to take additional steps to allow OpenVPN to work:

sudo setsebool -P openvpn_can_network_connect on

Step 7: Connect to Your OpenVPN Server

After installation, the script will provide you with a .ovpn configuration file for the client you created. You can find it in your home directory (~/your-client-name.ovpn). You need to transfer this file to your local machine.

Use scp to securely copy the .ovpn file onto your local machine. For example:

scp username@your_server_ip:~/your-client-name.ovpn ~/

Make sure to replace username and your_server_ip with your specific details.

Step 8: Install OpenVPN Client on Your Local Machine

To connect using OpenVPN, you'll need to install an OpenVPN client on your local machine. Here are some popular options:

• Windows: Download from OpenVPN's website.
• macOS: Use Tunnelblick.
• Linux: Install OpenVPN using your package manager (e.g., sudo apt install openvpn for Ubuntu).

Once the client is installed, import the .ovpn configuration file into your client and initiate the connection.

Step 9: Verify Your Connection

After connecting, you can verify your IP address by visiting a website like What Is My IP. It should show the IP address of your VPS instead of your local ISP's IP.

Step 10: Additional User Management

If you need to add more clients or revoke access, re-run the installation script:

sudo ./openvpn-install.sh

You will have options to add or revoke users and adjust configurations as needed.

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