How To Set Up and Configure an OpenVPN Server on CentOS 7

How To Set Up and Configure an OpenVPN Server on CentOS 7

How To Set Up and Configure an OpenVPN Server on CentOS 7

OpenVPN is an open-source virtual private network (VPN) solution that allows you to securely connect to a remote network over the internet. In this tutorial, we will guide you through the process of setting up and configuring an OpenVPN server on CentOS 7.

Prerequisites

To follow this tutorial, you will need:

  • A CentOS 7 server with root access
  • A non-root user with sudo privileges
  • A static IP address for your server
  • A basic understanding of Linux commands

Step 1: Update Your Server

Before we begin, it is important to update your server to the latest packages. To do this, run the following commands:

sudo yum update
sudo yum upgrade

Step 2: Install OpenVPN

Next, we need to install OpenVPN. To do this, run the following command:

sudo yum install epel-release -y
sudo yum install openvpn -y

Step 3: Configure OpenVPN

Now that OpenVPN is installed, we need to configure it. To do this, we will create a configuration file. Run the following command:

sudo nano /etc/openvpn/server.conf

Inside the configuration file, paste the following:

port 1194
proto udp
dev tun
ca ca.crt
cert server.crt
key server.key
dh dh2048.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 8.8.8.8"
push "dhcp-option DNS 8.8.4.4"
keepalive 10 120
cipher AES-256-CBC
comp-lzo
user nobody
group nobody
persist-key
persist-tun
status openvpn-status.log
verb 3

Save and exit the file by pressing CTRL+X, Y, and ENTER.

Step 4: Generate Certificates and Keys

Next, we need to generate certificates and keys. To do this, run the following command:

cd /etc/openvpn/easy-rsa/
source ./vars
./clean-all
./build-ca
./build-key-server server
./build-dh
openvpn --genkey --secret ta.key

Once you have generated the certificates and keys, copy them to the /etc/openvpn directory:

cp pki/ca.crt

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