How to Set Up a Secure VPN with WireGuard on Ubuntu Server

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Introduction: In the era of remote work and increased concerns for digital privacy, setting up a Virtual Private Network (VPN) has become more crucial than ever. WireGuard is a modern VPN protocol featuring high security and better performance compared to older protocols. This tutorial will guide you through the process of setting up WireGuard on an Ubuntu Server.

Prerequisites: Before starting, ensure you have the following: an Ubuntu Server (20.04 or later) with root access, a basic understanding of Linux commands, and a public IP address for your server.

Step 1: Install WireGuard

Firstly, you need to install WireGuard on your Ubuntu Server. Open your terminal and run the following commands: 

sudo apt update
sudo apt install wireguard
These commands update your package list and install WireGuard.

Step 2: Configure WireGuard

After installation, you need to configure the VPN server settings. Start by generating the private and public keys: 

cd /etc/wireguard/
umask 077
wg genkey | tee privatekey | wg pubkey > publickey
Note the key outputs as you will need them later.

Create a new configuration file for your VPN server: 

nano wg0.conf
In this file, input the following configuration, adjusting the IP addresses as necessary: 
[Interface]
PrivateKey = [Your Server's Private Key]
Address = 10.200.200.1/24
ListenPort = 51820
SaveConfig = true

[Peer]
PublicKey = [Your Peer's Public Key]
AllowedIPs = 10.200.200.2/32
Replace "[Your Server's Private Key]" and "[Your Peer's Public Key]" with the appropriate keys you generated earlier.

Step 3: Enable and Start WireGuard

To enable and start the WireGuard service, use the following commands: 

sudo systemctl enable wg-quick@wg0.service
sudo systemctl start wg-quick@wg0.service
This sets the WireGuard service to start at boot and runs it immediately.

Conclusion: You now have a basic WireGuard VPN set up on your Ubuntu Server. This setup provides a secure and private tunnel for your internet traffic. For further customization and security, consider adding firewall rules and configuring additional peers.

Note: Always ensure you comply with local laws and regulations when configuring network services like VPNs.

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